Perpetual devotion to what a man calls his business, is only to be sustained by perpetual neglect of many other things.

To think that so many have succeeded in dying!

We cannot think with precision unless in our own minds we use words with precision.

The aphorism is cultivated only by those who have known fear in the midst of words, that fear of collapsing with all the words.

The highest form of vanity is love of fame.

When I'm bored, my sense of values goes to sleep. But it's not dead, only asleep. A crisis can wake it up and make the world seem infinitely important and interesting. But what I need to learn is the trick of shaking them awake myself . . . And incidentally, another name for the sense of values is intelligence. A stupid person is a person whose values are narrow.

The prejudices of the second species, since they impose upon the intellect by the sensual conditions restricting the mind if it wishes in certain cases to attain to what is intellectual, lurk more deeply. One of them is that which affects knowledge of quantity, the other that affecting knowledge of qualities generally. The former is: every actual multiplicity can be given numerically, and hence, every infinite quantity; the latter, whatever is impossible contradicts itself. In either of them the concept of time, it is true, does not enter into the very notion of the predicate, nor is it attributed as a qualification to the subject. But yet it serves as a means for forming an idea of the predicate, and thus, being a condition, affects the intellectual concept of the subject to the extent that the latter is only attained by its aid.

The teaching of my philosophy... that our whole existence is something which had better not have been, and that to disown and disclaim it is the highest wisdom.

One always speaks badly when one has nothing to say.

If space in infinite, how about the space inside man? Blake said that eternity opens from the center of an atom. My former terror vanished. Now I saw that I was mistaken in thinking of myself as an object in a dead landscape. I had been assuming that man is limited because his brain is limited, that only so much can be packed into the portmanteau. But the spaces of the mind are a new dimension. The body is a mere wall between two infinities. Space extends to infinity outwards; the mind stretches to infinity inwards.

The man who says that the world is a machine has really advanced no further than to say that he is so well satisfied with the analogy that he is through with searching any further.

Nihilism is not overcome by arguments or analyses; it is tamed by love and care. Any disease of the soul must be conquered by a turning of one's soul.

Accept in an unruffled spirit that which is inevitable.

The evolutionary urge drives man to seek for intenser forms of fulfillment, since his basic urge is for more life, more consciousness, and this contentment has an air of stagnation that the healthy mind rejects. (This recognition lies at the centre of my own 'outsider theory': that there are human beings to whom comfort means nothing, but whose happiness consists in following an obscure inner-drive, an 'appetite for reality'.)

Well, then, arrest him. You can accuse him of something or other afterward.

Though they may think the proof incomplete that the universe is a work of design, and though they assuredly disbelieve that it can have an Author and Governor who is absolute in power as well as perfect in goodness, they have that which constitutes the principal worth of all religions whatever, an ideal conception of a Perfect Being, to which they habitually refer as the guide of their conscience; and this ideal of Good is usually far nearer to perfection than the objective Deity of those, who think themselves obliged to find absolute goodness in the author of a world so crowded with suffering and so deformed by injustice as ours.

Modern physics... reduces matter to a set of events which proceed outward from a centre. If there is something further in the centre itself, we cannot know about it, and it is irrelevant to physics.

The purpose of aphorisms is to keep fools who have memorised them from having nothing to say.

Do you see this egg? With this you can topple every theological theory, every church or temple in the world. What is it, this egg, before the seed is introduced into it? An insentient mass. And after the seed has been introduced to into it? What is it then? An insentient mass. For what is the seed itself other than a crude and inanimate fluid? How is this mass to make a transition to a different structure, to sentience, to life? Through heat. And what will produce that heat in it? Motion. "Conversation Between D'Alembert and Diderot", as quoted in Selected Writings (1966) edited by Lester G. Crocker, and The Enlightenment and the Intellectual Foundations of Modern Culture (2004) by Louis K Dupré, p. 30 Variant translation: See this egg. It is with this that all the schools of theology and all the temples of the earth are to be overturned.

I maintain that in every special natural doctrine only so much science proper is to be met with as mathematics; for... science proper, especially of nature, requires a pure portion, lying at the foundation of the empirical, and based upon à priori knowledge of natural things. ...the conception should be constructed. But the cognition of the reason through construction of conceptions is mathematical. A pure philosophy of nature in general, namely, one that only investigates what constitutes a nature in general, may thus be possible without mathematics; but a pure doctrine of nature respecting determinate natural things (corporeal doctrine and mental doctrine), is only possible by means of mathematics; and as in every natural doctrine only so much science proper is to be met with therein as there is cognition à priori, a doctrine of nature can only contain so much science proper as there is in it of applied mathematics.

Free trade, one of the greatest blessings which a government can confer on a people, is in almost every country unpopular.

I called it a small light shining and shaping in the huge vortex of Norse darkness. Yet the darkness itself was alive; consider that. It was the eager inarticulate uninstructed Mind of the whole Norse People, longing only to become articulate, to go on articulating ever farther!

Nonviolence is not an absolute principle, but an open-ended struggle with violence and its countervailing forces.

Tis from the resemblance of the external actions of animals to those we ourselves perform, that we judge their internal likewise to resemble ours; and the same principle of reasoning, carry'd one step farther, will make us conclude that since our internal actions resemble each other, the causes, from which they are deriv'd, must also be resembling.

It is the duty of every patriot to protect his country from its government.

It is truly a marvelous thing to consider to what greatness Athens arrived in the space of one hundred years after she freed herself from the tyranny of Pisistratus; but, above all, it is even more marvelous to consider the greatness Rome reached when she freed herself from her kings. The reason is easy to understand, for it is the common good and not private gain that makes cities great. Yet, without a doubt, this common good is observed only in republics, for in them everything that promotes it is practised, and however much damage it does to this or that private individual, those who benefit from the said common good are so numerous that they are able to advance in spite of the inclination of the few citizens who are oppressed by it.

Philosophy is a hypothetical interpretation of the unknown (as in metaphysics), or of the inexactly known (as in ethics or political philosophy); it is the front trench in the siege of truth.

Society and conversation, therefore, are the most powerful remedies for restoring the mind to its tranquillity, if, at any time, it has unfortunately lost it; as well as the best preservatives of that equal and happy temper, which is so necessary to self-satisfaction and enjoyment. Men of retirement and speculation, who are apt to sit brooding at home over either grief or resentment, though they may often have more humanity, more generosity, and a nicer sense of honour, yet seldom possess that equality of temper which is so common among men of the world.

No greater mistake can be made than to imagine that what has been written latest is always the more correct; that what is written later on is an improvement on what was written previously; and that every change means progress. Men who think and have correct judgment, and people who treat their subject earnestly, are all exceptions only. Vermin is the rule everywhere in the world: it is always at hand and busily engaged in trying to improve in its own way upon the mature deliberations of the thinkers.

She believed in nothing; only her skepticism kept her from being an atheist.

It cannot be sufficiently emphasized that revolution is in vain unless inspired by its ultimate ideal. Revolutionary methods must be in tune with revolutionary aims. The means used to further the revolution must harmonize with its purposes. In short, the ethical values which the revolution is to establish in the new society must be initiated with the revolutionary activities of the so-called transitional period. The latter can serve as a real and dependable bridge to the better life only if built of the same material as the life to be achieved.

No one has the audacity to exclaim: "I don't want to do anything!" - we are more indulgent with a murderer than with a mind emancipated from actions.

There will be no mass-based feminist movement as long as feminist ideas are understood only by a well-educated few.

I have come to believe that you can get along without anyone - that is, without the close contact of any one person. That is a terrible shock to me, but I think it is true. You do need companionship, but wherever you go, in whatever new environment, you will find people who, to a large degree, take the place of those you left...The intimate companionship goes, I think, when you leave a friend, but friendship stays. It is an inherent possibility of relationship that, once admitted - well, there it is.

So far as it has gone, it probably is the most pure and defecated publick good which ever has been conferred on mankind.

Raise your eyes and count the small gang of your oppressors who are only strong through the blood they suck from you and through your arms which you lend them unwillingly.

The discarnate TV user lives in a world between fantasy and dream, and is in a typically hypnotic state, which is the ultimate form and level of participation.

An intolerant sect has no right to complain when it is denied an equal liberty. ... A person's right to complain is limited to principles he acknowledges himself.

(The end is) life in agreement with nature.

The animals themselves are incapable of demanding their own liberation, or of protesting against their condition with votes, demonstrations, or boycotts. Human beings have the power to continue to oppress other species forever, or until we make this planet unsuitable for living beings. Will our tyranny continue, proving that morality counts for nothing when it clashes with selfinterest, as the most cynical of poets and philosophers have always said? Or will we rise to the challenge and prove our capacity for genuine altruism by ending our ruthless exploitation of the species in our power, not because we are forced to do so by rebels or terrorists, but because we recognize that our position is morally indefensible? The way in which we answer this question depends on the way in which each one of us, individually, answers it.

Eloquence may strike the ear, but the language of poverty strikes the heart; the first may charm like music, but the second alarms like a knell. 

The example of the Jews, in many things, may not be imitated by us; they had not only orders to cut off several nations altogether, but if they were obliged to war with others, and conquered them, to cut off every male; they were suffered to use polygamy and divorces, and other things utterly unlawful to us under clearer light.

To have accomplished nothing and to die overworked.

Underneath the superficial self, which pays attention to this and that, there is another self, more really us than I. And if you become aware of that unknown self, the more you become aware of it, the more you realize that it is inseparably connected with everything else that there is. That you are a function of this total galaxy, bounded by the Milky Way, and that furthermore, this galaxy is a function of all other galaxies. And that vast thing that you see far off, far off, far off with telescopes, and you look and look and look, one day you are going to wake up and say, why, that's me! And in knowing that, know, you see, that you never die. That you are the eternal thing that comes and goes, that appears now as John Jones, now as Mary Smith, now as Betty Brown, and so it goes forever and ever and ever.

Freedom is the absolute right of every human being to seek no other sanction for his actions but his own conscience, to determine these actions solely by his own will, and consequently to owe his first responsibility to himself alone.

The first step to get this noble and manly steadiness, is... carefully keep children from frights of all kinds, when they are young. ...Instances of such who in a weak timorous mind, have borne, all their whole lives through, the effects of a fright when they were young, are every where to be seen, and therefore as much as may be to be prevented.

Scaffolds, dungeons, jails flourish only in the shadow of a faith - of that need to believe which has infested the mind forever. The devil pales beside the man who owns a truth, his truth. We are unfair to a Nero, a Tiberius: it was not they who invented the concept heretic: they were only degenerate dreamers who happened to be entertained by massacres. The real criminals are men who establish an orthodoxy on the religious or political level, men who distinguish between the faithful and the schismatic.