Five [of the above] rules are of absolute necessity, and cannot be dispensed with without essential defect and often without error.

Rather, power is most powerful, most stable, where it creates a feeling of freedom and where it does not need to resort to violence.

Faith feels itself secure neither with universal consent, nor with tradition, nor with authority. It seeks support of its enemy, reason.

Dear youths, I warn you cherish peace divine, And in your hearts lay deep these words of mine.

The natural way of doing this [seeking scientific knowledge or explanation of fact] is to start from the things which are more knowable and obvious to us and proceed towards those which are clearer and more knowable by nature; for the same things are not 'knowable relatively to us' and 'knowable' without qualification. So in the present inquiry we must follow this method and advance from what is more obscure by nature, but clearer to us, towards what is more clear and more knowable by nature. Now what is to us plain and obvious at first is rather confused masses, the elements and principles of which became known to us by later analysis...

The sentiments of men often differ with regard to beauty and deformity of all kinds, even while their general discourse is the same ... In all matters of opinion and science, the case is opposite: The difference among men is there oftener found to lie in generals than in particulars; and to be less in reality than in appearance.

I would like to go mad on one condition, namely, that I would become a happy madman, lively and always in a good mood, without any troubles and obsessions, laughing senselessly from morning to night.

Those who cannot find moral clarity are likely to settle for the far more dangerous simplicity, or purity, instead.

My dear reader, read aloud, if possible! If you do so, allow me to thank you for it: if you not only do it yourself, if you also influence others to do it, allow me to thank each one of them, and you again and again!

A man must be perfectly crazy who, where there is tolerable security, does not employ all the stock which he commands…

There is probably no more abused a term in the history of philosophy than "representation," and my use of this term differs both from its use in traditional philosophy and from its use in contemporary cognitive psychology and artificial intelligence.... The sense of "representation" in question is meant to be entirely exhausted by the analogy with speech acts: the sense of "represent" in which a belief represents its conditions of satisfaction is the same sense in which a statement represents its conditions of satisfaction. To say that a belief is a representation is simply to say that it has a propositional content and a psychological mode.

Lost time was like a run in a stocking. It always got worse.

A writer who takes political, social or literary positions must act only with the means that are his. These means are the written words.

The tyranny of a multitude is a multiplied tyranny.

I bow before the authority of special men because it is imposed upon me by my own reason. I am conscious of my inability to grasp, in all its details and positive developments, any very large portion of human knowledge. The greatest intelligence would not be equal to a comprehension of the whole. Thence results, for science as well as for industry, the necessity of the division and association of labor. I receive and I give - such is human life. Each directs and is directed in his turn. Therefore there is no fixed and constant authority, but a continual exchange of mutual, temporary, and, above all, voluntary authority and subordination.

Friendship, I have said, is born at the moment when one man says to another "What! You too? I thought that no one but myself..."

... and where men build on false grounds, the more they build, the greater is the ruine.

A great deal of intelligence can be invested in ignorance when the need for illusion is deep. To Jerusalem and Back: A Personal Account (1976), p. 127 Compare: It's a point so blindingly obvious that only an extraordinarily clever and sophisticated person could fail to grasp it.

I suddenly dreamt that I picked up the revolver and aimed it straight at my heart - my heart, and not my head; and I had determined beforehand to fire at my head, at my right temple. After aiming at my chest I waited a second or two, and suddenly my candle, my table, and the wall in front of me began moving and heaving. I made haste to pull the trigger.

As to why some are touched by the law and others not, so that some receive and others scorn the offer of grace...[this is the] hidden will of God, Who, according to His own counsel, ordains such persons as He wills to receive and partake of the mercy preached and offered.

The fact that life evolved out of nearly nothing, some 10 billion years after the universe evolved out of literally nothing, is a fact so staggering that I would be mad to attempt words to do it justice.

When Eudæmonidas heard a philosopher arguing that only a wise man can be a good general, "This is a wonderful speech," said he; "but he that saith it never heard the sound of trumpets."

Commit no slander; so that infamy and wickedness may not happen unto thee.

The foundations on which several duties are built, and the foundations of right and wrong from which they spring, are not perhaps easily to be let into the minds of grown men, not us'd to abstract their thoughts from common received opinions. Much less are children capable of reasonings from remote principles. They cannot conceive the force of long deductions. The reasons that move them must be obvious, and level to their thoughts, and such as may be felt and touched. But yet, if their age, temper, and inclination be consider'd, they will never want such motives as may be sufficient to convince them.

It is impossible to pursue this nonsense any further.

Survival machines that can simulate the future are one jump ahead of survival machines that who can only learn of the basis of trial and error. The trouble with overt trial is that it takes time and energy. The trouble with overt error is that it is often fatal. ...The evolution of the capacity to simulate seems to have culminated in subjective consciousness. Why this should have happened is, to me, the most profound mystery facing modern biology.

When an opinion has taken root in a democracy and established itself in the minds of the majority, it afterward persists by itself, needing no effort to maintain it since no one attacks it. Those who at first rejected it as false come in the end to adopt it as accepted, and even those who still at the bottom of their hearts oppose it keep their views to themselves, taking great care to avoid a dangerous and futile contest.

An army of principles will penetrate where an army of soldiers cannot; it will succeed where diplomatic management would fall: it is neither the Rhine, the Channel, nor the ocean that can arrest its progress: it will march on the horizon of the world, and it will conquer.

More than a century ago, in 1804, in Letter XC of that series that constitutes the immense monody of his Obermann, Sénancour wrote the words which I have put at the head of this chapter - and of all the spiritual descendants of the patriarchal Rousseau, Sénancour was the most profound and intense; of all the men of heart and feeling that France has produced, not excluding Pascal, he was the most tragic. "Man is perishable. That may be; but let us perish resisting, and if it is nothingness that awaits us, do not let us so act that it shall be a just fate." Change this sentence from it negative to the positive form - "And if it is nothingness that awaits us, let us so act that it shall be an unjust fate" - and you get the firmest basis of action for the man who cannot or will not be a dogmatist.

In a word, neither death, nor exile, nor pain, nor anything of this kind is the real cause of our doing or not doing any action, but our inward opinions and principles.

While loving glory so much how can you persist in a plan which will cause you to lose it?

Human vanity cherishes the absurd notion that our species is the final goal of evolution.

Beauty is indeed a good gift of God; but that the good may not think it a great good, God dispenses it even to the wicked.

The Ideal Man of the eighteenth century was the Rationalist; of the seventeenth, the Christian Stoic; of the Renaissance, the Free Individual; of the Middle Ages, the Contemplative Saint. And what is our Ideal Man? On what grand and luminous mythological figure does contemporary humanity attempt to model itself? The question is embarrassing. Nobody knows. And, in spite of all the laudable efforts of the Institute for Intellectual Co-operation to fabricate an acceptable Ideal Man for the use of Ministers of Education, nobody, I suspect, will know until such time as a major poet appears upon the scene with the unmistakable revelation. Meanwhile, one must be content to go on piping up for reason and realism and a certain decency.

I do not think discursively. It is not so much that I arrive at truth as that I take my start from it.

All media work us over completely. They are so pervasive in their personal, political, economic, aesthetic, psychological, moral, ethical, and social consequences that they leave no part of us untouched, unaffected, unaltered. The medium is the massage. Any understanding of social and cultural change is impossible without a knowledge of the way media work as environments. All media are extensions of some human faculty - psychic or physical.

So monstrous is the making and keeping them slaves at all, abstracted from the barbarous usage they suffer, and the many evils attending the practice; as selling husbands away from wives, children from parents, and from each other, in violation of sacred and natural ties; and opening the way for adulteries, incests, and many shocking consequences, for all of which the guilty Masters must answer to the final Judge.

There are no whole truths; all truths are half-truths. It is trying to treat them as whole truths that plays the devil.

Once you had read the Psychopathology of Everyday Life, you knew that everyday life was psychopathology.

But it is better perhaps to examine next the universal good, and to enquire in what sense the expression is used. Though such an investigation is likely to be difficult, because the persons who have introduced these ideas are our friends. Yet it will perhaps appear the best, and indeed the right course, at least for the preservation of truth, to do away with private feelings, especially as we are philosophers; for since both are dear to us, we are bound to prefer the truth.

If there is a devil in human history, that devil is the principle of command. It alone, sustained by the ignorance and stupidity of the masses, without which it could not exist, is the source of all the catastrophes, all the crimes, and all the infamies of history.

Your Constitution is all sail and no anchor.

If science is not to degenerate into a medley of ad hoc hypotheses, it must become philosophical and must enter upon a thorough criticism of its own foundations.

The harmony between word and deed in Socrates' life is Dorian... manifested in the courage he showed at Delium. This harmonic accord... distinguishes Socrates from a sophist... [who] can give... fine and beautiful discourses on courage, but is not courageous... [U]nlike the sophist, he can use parrhesia and speak freely because what he says accords... with what he thinks... [which] accords... with what he does.

The martyr sacrifices herself (himself in a few instances) entirely in vain. Or rather not in vain; for she (or he) makes the selfish more selfish, the lazy more lazy, the narrow narrower.

A man is more a man through the things he keeps to himself than through those he says.

The scientific attitude of mind involves a sweeping away of all other desires in the interests of the desire to know-it involves suppression of hopes and fears, loves and hates, and the whole subjective emotional life, until we become subdued to the material, able to see it frankly, without preconceptions, without bias, without any wish except to see it as it is, and without any belief that what it is must be determined by some relation, positive or negative, to what we should like it to be, or to what we can easily imagine it to be.

For a large class of cases - though not for all - in which we employ the word meaning it can be explained thus: the meaning of a word is its use in the language.

To enrich God, man must become poor; that God may be all, man must be nothing.