Life is short, but its ills make it seem long.

On the whole, Borne, Heine, Feuerbach, and such authors are the individualities who have great interest for someone who is composing an imaginary construction. They frequently are well informed about the religious-that is, they know definitely that they do not want to have anything to do with it. This is a great advantage over the systematicians, who without knowing where the religious really is located take it upon themselves to explain it-sometimes obsequiously, sometimes superciliously, but always unsuccessfully.

Poetry must have something in it that is barbaric, vast and wild.

The pessimist has to invent new reasons to exist every day: he is a victim of the "meaning" of life.

Quietism is the attitude of people who say, "let others do what I cannot do." The doctrine I am presenting before you is precisely the opposite of this, since it declares that there is no reality except in action. It goes further, indeed, and adds, "Man is nothing else but what he purposes, he exists only in so far as he realizes himself, he is therefore nothing else but the sum of his actions, nothing else but what his life is." Hence we can well understand why some people are horrified by our teaching.

Once the good man was dead, one wore his hat and another his sword as he had worn them, a third had himself barbered as he had, a fourth walked as he did, but the honest man that he was - nobody any longer wanted to be that.

I Jesus have sent mine angel to testify unto you these things in the churches. I am the root and the offspring of David, and the bright and morning star.

"For I am holy." When I hear these words I recognize the voice of the Saviour. But shall I take away my own? Certainly when He speaks thus He speaks in inseparable union with His body. But can I say, "I am holy"? If I mean a holiness that I have not received, I should be proud and a liar; but if I mean a holiness that I have received - as it is written: "Be ye holy because I the Lord your God am holy" (Lev. 19:2) - then let the body of Christ say these words. And let this one man, who cries from the ends of the earth, say with his Head and united with his Head: "I am holy." … That is not foolish pride, but an expression of gratitude. If you were to say that you are holy of yourselves, that would be pride; but if, as one of Christ's faithful and as a member of Christ, you say that you are not holy, you are ungrateful.

It is a profoundly erroneous truism, repeated by all copy-books and by eminent people when they are making speeches, that we should cultivate the habit of thinking of what we are doing. The precise opposite is the case. Civilization advances by extending the number of important operations which we can perform without thinking about them. Operations of thought are like cavalry charges in a battle - they are strictly limited in number, they require fresh horses, and must only be made at decisive moments.

No one has the right to obey.

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.

As all those have shown who have discussed civil institutions, and as every history is full of examples, it is necessary to whoever arranges to found a Republic and establish laws in it, to presuppose that all men are bad and that they will use their malignity of mind every time they have the opportunity; and if such malignity is hidden for a time, it proceeds from the unknown reason that would not be known because the experience of the contrary had not been seen, but time, which is said to be the father of every truth, will cause it to be discovered.

Thus, all unknown quantities can be expressed in terms of a single quantity, whenever the problem can be constructed by means of circles and straight lines, or by conic sections, or even by some other curve of degree not greater than the third or fourth.But I shall not stop to explain this in more detail, because I should deprive you of the pleasure of mastering it yourself, as well as of the advantage of training your mind by working over it, which is in my opinion the principal benefit to be derived from this science. Because, I find nothing here so difficult that it cannot be worked out by anyone at all familiar with ordinary geometry and with algebra, who will consider carefully all that is set forth in this treatise.

Humiliate the reason and distort the soul...

Human intuitions are systematically biased. Evolutionary psychology explains how our moral intuitions and the rationalisations they spawn have been shaped by millennia of natural selection to maximise the inclusive fitness of our genes, not to track the welfare of other sentient beings impartially conceived. Many human cultures have found nothing intuitively wrong with aggressive warfare, slavery, wife-beating, infanticide or female genital mutilation. Ultimately, folk morality is a doomed enterprise as hopeless as folk physics. A mature posthuman ethics, I'd argue, must be committed to the well-being of all sentient life; and mature posthuman technology offers the means to deliver that commitment.

Zeno: The many do not know that except by this devious passage through all things the mind cannot attain to the truth. Zeno: Most people are not aware that this roundabout progress through all things is the only way in which the mind can attain truth and wisdom.

Life is that which is discontent, which struggles and seeks, which suffers and creates.

An utterance can have Intentionality, just as a belief has Intentionality, but whereas the Intentionality of the belief is intrinsic the Intentionality of the utterance is derived.

I am a rationalist. ...I mean ...[I] wish... to understand the world, and to learn by arguing with others. (...I do not say a rationalist holds the mistaken theory that men are... rational.)

Only in growth, reform, and change, paradoxically enough, is true security to be found.

It is often said, mainly by the 'no-contests', that although there is no positive evidence for the existence of God, nor is there evidence against his existence. So it is best to keep an open mind and be agnostic. At first sight that seems an unassailable position, at least in the weak sense of Pascal's wager. But on second thoughts it seems a cop-out, because the same could be said of Father Christmas and tooth fairies. There may be fairies at the bottom of the garden. There is no evidence for it, but you can't prove that there aren't any, so shouldn't we be agnostic with respect to fairies?

If truth were not boring, science would have done away with God long ago. But God as well as the saints is a means to escape the dull banality of truth.

Every man is fully satisfied that there is such a thing as truth, or he would not ask any question.

The actor's realm is that of the fleeting.

The end cannot justify the means for the simple and obvious reason that the means employed determine the nature of the ends produced.

Humans are prone to status quo bias. So let's do a thought-experiment. Imagine we stumble across an advanced civilisation that has abolished predation, disease, famine, and all the horrors of primitive Darwinian life. The descendants of archaic lifeforms flourish unmolested in their wildlife parks - free living, but not "wild". Should we urge scrapping their regime of compassionate stewardship of the living world - and a return to asphyxiation, disembowelling and being eaten alive? Or is a happy biosphere best conserved intact? Reply to "Should humans wipe out all carnivorous animals so the succeeding generations of herbivores can live in peace?"

The late philosopher Morris R. Cohen of CCNY was asked by a student in the metaphysics course, "Professor Cohen, how do I know that I exist?" The keen old prof replied, "And who is asking?"

The Catholic solution of our problem, of our unique vital problem, the problem of the immortality and eternal salvation of the soul, satisfies the will, and therefore satisfies life; but the attempt to rationalize it by means of a dogmatic theology fails to satisfy the reason. And reason has its exigencies as imperious as those of life. It is no use seeking to force ourselves to consider as super-rational what clearly appears to us to be contra-rational... Infallibility, a notion of Hellenic origin, is in its essence a rationalistic category.

At electric speed, all forms are pushed to the limits of their potential.

My purpose is to explain, not the meaning of words, but the nature of things.

The two ways of contemplation are not unlike the two ways of action commonly spoken of by the ancients: the one plain and smooth in the beginning, and in the end impassable; the other rough and troublesome in the entrance, but after a while fair and even. So it is in contemplation: If a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts he shall end in certainties.

The mind celebrates a little triumph whenever it can formulate a truth, however unwelcome to the flesh, or discover an actual force, however unfavourable to given interests.

I, for my part, do not conceive an act as having causes, and I consider myself satisfied when I have found in it not its 'factors' but the general themes which it organizes: for our decisions gather into new syntheses and on new occasions the leitmotif that governs our life

I cannot believe - and I say this with all the emphasis of which I am capable - that there can ever be any good excuse for refusing to face the evidence in favour of something unwelcome. It is not by delusion, however exalted, that mankind can prosper, but only by unswerving courage in the pursuit of truth.

Vice itself lost half its evil by losing all its grossness.

Clichés, stock phrases, adherence to conventional, standardized codes of expression and conduct have the socially recognized function of protecting us against reality.

There is not love of life without despair about life.

"Normal science" means research firmly based upon one or more past scientific achievements, achievements that some particular scientific community acknowledges for a time as supplying the foundation for its further practice.

If people did not sometimes do silly things, nothing intelligent would ever get done.

I get along quite well with someone only when he is at his lowest point and has neither the desire nor the strength to restore his habitual illusions.

Man is always partial and is quite right to be. Even impartiality is partial.

Suicide may also be regarded as an experiment - a question which man puts to Nature, trying to force her to answer. The question is this: What change will death produce in a man's existence and in his insight into the nature of things? It is a clumsy experiment to make; for it involves the destruction of the very consciousness which puts the question and awaits the answer.

Knowing whether or not one can live without appeal is all that interests me.

Struggling to be brief I become obscure.

We have the greatest admiration for this learned doctor: with what scientific stoicism he walks through the land of wonders, unwondering; like a wise man through some huge, gaudy, imposing Vauxhall, whose fire-works, cascades and symphonies, the vulgar may enjoy and believe in,-but where he finds nothing real but the saltpetre, pasteboard and catgut.

Avoid shame, but do not seek glory: nothing so expensive as glory.

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.

Neoconservatives believed that history can be pushed along with the right application of power and will. Leninism was a tragedy in its Bolshevik version, and it has returned as farce when practiced by the United States. Neoconservatism, as both a political symbol and a body of thought, has evolved into something I can no longer support. ..."War" is the wrong metaphor for the broader struggle, since wars are fought at full intensity and have clear beginnings and endings. Meeting the jihadist challenge is more of a "long, twilight struggle" whose core is not a military campaign but a political contest for the hearts and minds of ordinary Muslims around the world.