When one admits that nothing is certain one must, I think, also admit that some things are much more nearly certain than others. It is much more nearly certain that we are assembled here tonight than it is that this or that political party is in the right. Certainly there are degrees of certainty, and one should be very careful to emphasize that fact, because otherwise one is landed in an utter skepticism, and complete skepticism would, of course, be totally barren and completely useless.

Christianity possesses the great advantage over Judaism of being represented as coming from the mouth of the first Teacher not as a statutory but as a moral religion, and as thus entering into the closest relation with reason so that, through reason, it was able of itself, without historical learning, to be spread at all times and among all peoples with the greatest trustworthiness.

As the analysis of a substantial composite terminates only in a part which is not a whole, that is, in a simple part, so synthesis terminates only in a whole which is not a part, that is, the world.

He who has begun has half done. Dare to be wise; begin!

To rank the effort above the prize may be called love.

The aggregate capital appears as the capital stock of all individual capitalists combined. This joint stock company has in common with many other stock companies that everyone knows what he puts in, but not what he will get out of it.

Be not afraid of life. Believe that life is worth living, and your belief will help create the fact.

I greatly doubt whether the men who become pirate chiefs are those who are filled with retrospective terror of their fathers, or whether Napoleon, at Austerlitz, really felt that he was getting even with Madame Mère. I know nothing of the mother of Attila, but I rather suspect that she spoilt the little darling, who subsequently found the world irritating because it sometimes resisted his whims.

We all look for happiness, but without knowing where to find it: like drunkards who look for their house, knowing dimly that they have one.

Thus the sum of things is ever being renewed, and mortal creatures live dependent one upon another. Some species increase, others diminish, and in a short space the generations of living creatures are changed and, like runners, pass on the torch of life.

Consciousness presupposes itself, and asking about its origin is an idle and just as sophistical a question as that old one, "What came first, the fruit-tree or the stone? Wasn't there a stone out of which came the first fruit-tree? Wasn't there a fruit-tree from which came the first stone?

A physician, after he had felt the pulse of Pausanias, and considered his constitution, saying, "He ails nothing," "It is because, sir," he replied, "I use none of your physic."

The ancient Egyptians had a superstitious antipathy to the sea; a superstition nearly of the same kind prevails among the Indians; and the Chinese have never excelled in foreign commerce.

Men are what their mothers made them.

If the injustice is part of the necessary friction of the machine of government, let it go, let it go; perchance it will wear smooth--certainly the machine will wear out. If the injustice has a spring, or a pulley, or a rope, or a crank, exclusively for itself, then perhaps you may consider whether the remedy will not be worse than the evil; but if it is of such a nature that it requires you to be the agent of injustice to another, then I say, break the law. Let your life be a counter-friction to stop the machine. What I have to do is to see, at any rate, that I do not lend myself to the wrong which I condemn.

A great myth is relevant as long as the predicament of humanity lasts; as long as humanity lasts. It will always work, on those who can receive it, the same catharsis.

For it is the same thing that can be thought and that can be.

I am Alpha and Omega, the beginning and the end, the first and the last. Revelation 22:13

This is probably the fundamental dimension of 'ideology': ideology is not simply a 'false consciousness', an illusory representation of reality, it is rather this reality itself which is already to be conceived as 'ideological' - 'ideological' is a social reality whose very existence implies the non-knowledge of its participants as to its essence -that is, the social effectivity, the very reproduction of which implies that the individuals 'do not know what they are doing'. 'Ideological is not the false consciousness of a (social) being but this being itself in so far as it is supported by "false consciousness"'. Thus we have finally reached the dimension of the symptom, because one of its possible definitions would also be 'a formation whose very consistency implies a certain non-knowledge on the part of the subject': the subject can 'enjoy his symptom' only in so far as its logic escapes him - the measure of the success of its interpretation is precisely its dissolution.

There ought to be some regulation with respect to the spirit of denunciation that now prevails. If every individual is to indulge his private malignancy or his private ambition, to denounce at random and without any kind of proof, all confidence will be undermined and all authority be destroyed. Calumny is a species of treachery that ought to be punished as well as any other kind of treachery. It is a private vice productive of public evils; because it is possible to irritate men into disaffection by continual calumny who never intended to be disaffected.It is therefore equally as necessary to guard against the evils of unfounded or malignant suspicion as against the evils of blind confidence. It is equally as necessary to protect the characters of public officers from calumny as it is to punish them for treachery or misconduct.

Don't hold yourselves cheap, seeing that the creator of all things and of you estimates your value so high, so dear, that he pours out for you every day the most precious blood of his only-begotten Son.

[A]bsurdity is one of the most human things about us: a manifestation of our most advanced and interesting characteristics. ... [I]t is possible only because we possess a certain kind of insight - the capacity to transcend ourselves in thought.If a sense of the absurd is a way of perceiving our true situation (even though the situation is not absurd until the perception arises), then what reason can we have to resent or escape it? ... [I]t results from the ability to understand our human limitations. It need not be a matter of agony unless we make it so. Nor need it evoke a defiant contempt of fate that allows us to feel brave or proud. Such dramatics even if carried on in private, betray a failure to appreciate the cosmic unimportance of the situation. If sub specie aeternitatis there is no reason to believe that anything matters, then that does not matter either, and we can approach our absurd lives with irony instead of heroism or despair.

Neither of us cares a straw for popularity. A proof of this is for example, that, because of aversion to any personality cult, I have never permitted the numerous expressions of appreciation from various countries with which I was pestered during the existence of the International to reach the realm of publicity, and have never answered them, except occasionally by a rebuke. When Engels and I first joined the secret Communist Society we made it a condition that everything tending to encourage superstitious belief in authority was to be removed from the statutes.

Man is a goal-seeking animal. His life only has meaning if he is reaching out and striving for goals.

Now I am about to take my last voyage, a great leap in the dark.

For those who want 'to change life", 'to reinvent love,' God is nothing but a hindrance.

Creationists make it sound as though a "theory" is something you dreamt up after being drunk all night.

A man will be imprisoned in a room with a door that's unlocked and opens inwards; as long as it does not occur to him to pull rather than push it.

I have no patience with those who say that sexual excitement is shameful and that venereal stimuli have their origin not in nature, but in sin. Nothing is so far from the truth. As if marriage, whose function cannot be fulfilled without these incitements, did not rise above blame. In other living creatures, where do these incitements come from? From nature or from sin? From nature, of course. It must borne in mind that in the apetites of the body there is very little difference between man and other living creatures. Finally, we defile by our imagination what of its own nature is fair and holy. If we were willing to evaluate things not according to the opinion of the crowd, but according to nature itself, how is it less repulsive to eat, chew, digest, evacuate, and sleep after the fashion of dumb animals, than to enjoy lawful and permitted carnal relations?

As for the commercial business, I can no longer make head or tail of it. At one moment crisis seems imminent and the City prostrated, the next everything is set fair. I know that none of this will have any impact on the catastrophe.

All the interests of my reason, speculative as well as practical, combine in the three following questions: 1. What can I know? 2. What ought I to do? 3. What may I hope?

Ironic philosophies produce passionate works. Any thought that abandons unity glorifies diversity! And diversity is the home of art. The only thought to liberate the mind is that which leaves it alone, certain of its limits and of its impending end. No doctrine tempts it. It awaits the ripening of the work and of life.

In my opinion, all things in nature occur mathematically.

"Then those people are right who say that Heaven and Hell are only states of mind?" "Hush," he said sternly. "Do not blaspheme. Hell is a state of mind - ye never said a truer word. And every state of mind, left to itself, every shutting up of the creature within the dungeon of its own mind - is, in the end, Hell. But Heaven is not a state of mind. Heaven is reality itself. All that is fully real is Heavenly."

Appealing to his [Einstein's] way of expressing himself in theological terms, I said: If God had wanted to put everything into the universe from the beginning, He would have created a universe without change, without organisms and evolution, and without man and man's experience of change. But he seems to have thought that a live universe with events unexpected even by Himself would be more interesting than a dead one.

There are a thousand hacking at the branches of evil to one who is striking at the root, and it may be that he who bestows the largest amount of time and money on the needy is doing the most by his mode of life to produce that misery which he strives in vain to relieve.

Do not let habit, born from experience, force you along this road, directing aimless eye and echoing ear and tongue; but judge by reason the much contested proof which I have spoken.

The entire history of social improvement has been a series of transitions, by which one custom or institution after another, from being a supposed primary necessity of social existence, has passed into the rank of an universally stigmatized injustice and tyranny. So it has been with the distinctions of slaves and freemen, nobles and serfs, patricians and plebeians; and so it will be, and in part already is, with the aristocracies of colour, race, and sex.

Passing from quantity to quality of population, we come to the question of eugenics. We may perhaps assume that, if people grow less superstitious, government will acquire the right to sterilize those who are not considered desirable as parents. This power will be used, at first, to diminish imbecility, a most desirable object. But probably, in time, opposition to the government will be taken to prove imbecility, so that rebels of all kinds will be sterilized. Epileptics, consumptives, dipsomaniacs and so on will gradually be included; in the end, there will be a tendency to include all who fail to pass the usual school examinations. The result will be to increase the average intelligence; in the long run, it may be greatly increased. But probably the effect upon really exceptional intelligence will be bad. Mr. Micawber, who was Dickens's father, would hardly have been regarded as a desirable parent. How many imbeciles ought to outweigh one Dickens I do not profess to know.

The absurd is the essential concept and the first truth.

What has the Church done to thee, that thou shouldst wish to decapitate her? Thou wouldst take away her Head, and believe in the Head alone, despising the body. Vain is thy service, and false thy devotion to the Head. For to sever it from the body is an injury to both Head and body.

Science, ever since the time of the Arabs, has had two functions: (1) to enable us to know things, and (2) to enable us to do things.

I make no doubt... that these rules are simple, artless, and natural.

Good is a good doctor, but Bad is sometimes a better.

A mind does not receive truth as a chest receives jewels that are put into it, but as the stomach takes up food into the system. It is no longer food, but flesh, and is assimilated. The appetite and the power of digestion measure our right to knowledge. He has it who can use it. As soon as our accumulation overruns our invention or power to use, the evils of intellectual gluttony begin,- congestion of the brain, apoplexy, and strangulation.

The philosophy of Plotinus has the defect of encouraging men to look within rather than to look without: when we look within we see nous, which is divine, while when we look without we see the imperfections of the sensible world. This kind of subjectivity was a gradual growth; it is to be found in the doctrines of Protagoras, Socrates, and Plato, as well as in the Stoics and Epicureans. But at first it was only doctrinal, not temperamental; for a long time it failed to kill scientific curiosity. [...] Plotinus is both an end and a beginning-an end as regards the Greeks, a beginning as regards Christendom.

How will one part of the infinite be above, and another below? Or how will it have extremes or a middle? Further still, every sensible body is in place; but the species and differences of place are upward and downward, before and behind, to the right hand and to the left: and these things not only thus subsist with relation to us, and by position, but have a definite subsistence in the universe itself. But it is impossible that these things should be in the infinite: and... that there should be an infinite place. But every body is in place; and therefore it is also impossible that there should be an infinite body. ...Therefore ...there is not an infinite body in energy.

To see ourselves as others see us is a most salutary gift. Hardly less important is the capacity to see others as they see themselves.

The study of politics is a form of natural history. Thomas Hobbes loathed Aristotle's politics, and in Leviathan followed Plato in modeling politics on geometry; but he admired Aristotle's biology. One consequence of that "biological" style is important, not only because it was at odds with Hobbes's-and Plato's-hankering after political geometry. Aristotle claimed that political analysis should aim only "at as much precision as the subject matter permits." Political wisdom cannot aspire to the precision of geometry, and must not pretend to. Aboriculture suggests an analogy: most trees grow best in firm soil with a moderate water supply; a few thrive with their roots in mud and water. Alan Ryan, On Politics: A History of Political Thought: From Herodotus to the Present (2012), Ch. 3 : Aristotle: Politics Is Not Philosophy