Self-education is, I firmly believe, the only kind of education there is.

Time: That which man is always trying to kill, but which ends in killing him.

The deceiver is really the fool.

Only at quite rare moments have I felt really glad to be alive. I could not but feel with a sympathy full of regret all the pain that I saw around me, not only that of men but that of the whole creation. From this community of suffering I have never tried to withdraw myself. It seemed to me a matter of course that we should all take our share of the burden of pain which lies upon the world.

I am well aware, that men love to hear of their power, but have an extreme disrelish to be told of their duty.

What is tolerance? It is the consequence of humanity. We are all formed of frailty and error; let us pardon reciprocally each other's folly - that is the first law of nature.

Many of the actions by which men have become rich are far more harmful to the community than the obscure crimes of poor men, yet they go unpunished because they do not interfere with the existing order.

All true metaphysics is taken from the essential nature of the thinking faculty itself, and therefore in nowise invented, since it is not borrowed from experience, but contains the pure operations of thought, that is, conceptions and principles à priori, which the manifold of empirical presentations first of all brings into legitimate connection, by which it can become empirical knowledge, i.e. experience. ...mathematical physicists were thus quite unable to dispense with such metaphysical principles...

Who profits by a sin has done the sin.

I leave Sisyphus at the foot of the mountain! One always finds one's burden again. But Sisyphus teaches the higher fidelity that negates the gods and raises rocks. He too concludes that all is well. This universe henceforth without a master seems to him neither sterile nor futile. Each atom of that stone, each mineral flake of that night filled mountain, in itself forms a world. The struggle itself toward the heights is enough to fill a man's heart. One must imagine Sisyphus happy.

Our institutions and conditions rest upon deep-seated ideas. To change those conditions and at the same time leave the underlying ideas and values intact means only a superficial transformation, one that cannot be permanent or bring real betterment. It is a change of form only, not of substance, as so tragically proven by Russia.

The only progress I can see is progress in the organization. The ordinary human being does not live long enough to draw any substantial benefit from his own experience. And no one, it seems, can benefit by the experiences of others. Being both a father and teacher, I know we can teach our children nothing. We can transmit to them neither our knowledge of life nor of mathematics. Each must learn its lesson anew.

The system of banking we have both equally and ever reprobated. I contemplate it as a blot left in all our constitutions, which, if not covered, will end in their destruction, which is already hit by the gamblers in corruption, and is sweeping away in its progress the fortunes and morals of our citizens.

Now any dogma, based primarily on faith and emotionalism, is a dangerous weapon to use on others, since it is almost impossible to guarantee that the weapon will never be turned on the user.

It seems clear to me that marriage ought to be constituted by children, and relations not involving children ought to be ignored by the law and treated as indifferent by public opinion. It is only through children that relations cease to be a purely private matter.

Men seek retreats for themselves, houses in the country, sea-shores, and mountains; and thou too art wont to desire such things very much. But this is altogether a mark of the most common sort of men, for it is in thy power whenever thou shalt choose to retire into thyself. For nowhere either with more quiet or more freedom from trouble does a man retire than into his own soul. Variant translation: Nowhere can man find a quieter or more untroubled retreat than in his own soul.

It is within science itself, and not in some prior philosophy, that reality is to be identified and described.

All wars today tend to be netwars.

The best ideas are common property.

The sense in which an automatic door "understands instructions" from its photoelectric cell is not at all the sense in which I understand English.

In its solitariness the spirit asks, What, in the way of value, is the attainment of life? And it can find no such value till it has merged its individual claim with that of the objective universe.

Thus then does the Doctrine of Knowledge, which in its substance is the realisation of the absolute Power of intelligising which has now been defined, end with the recognition of itself as a mere Schema in a Doctrine of Wisdom, although indeed a necessary and indispensable means to such a Doctrine: - a Schema, the sole aim of which is, with the knowledge thus acquired, - by which knowledge alone a Will, clear and intelligible to itself and reposing upon itself without wavering or perplexity, is possible, - to return wholly into Actual Life; - not into the Life of blind and irrational Instinct which we have laid bare in all its nothingness, but into the Divine Life which shall become visible to us.

As for one-party rule, it was questioned neither by the Left Opposition nor by the Right [wing of the Communist party]. All were prisoners of their own doctrine and their own past: all had worked with a will to create the apparatus of violence that crushed them. Bukharin's hopeless attempt to form a league with Kamenev was no more than a pitiful epilogue to his career. In November 1929 the deviationists performed a public act of penance, but even this did not save them. Stalin's victory was complete; the collapse of the Bukharinite opposition meant the triumph of autocracy in the party and in the country. In December 1929 Stalin's fiftieth birthday was celebrated as a major historical event, and from this point we may date the "cult of personality". Trotsky's prophecy of 1903 had come true: party rule had become Central Committee rule, and this in turn had becorne the personal tyranny of a dictator.

First, [the bourgeoisie] must recognize his own impotence, his incapacity to believe in a sense of history, even if his reason leans towards the truth, the passions and prejudices produced by his class position, prevent him from accepting it. So he should not exert himself with proving the truth of the historical mission of the working class; rather, he should learn to subdue his petty bourgeois passions and prejudices. He should take lessons from those who were once as important as he is now but are ready to risk all for the revolutionary Cause.

An ignorant doctor is the aide-de-camp of death.

Instinct leads, intelligence does but follow.

Positivism ... implies the double falsehood that no interpretation is needed, and that it is not needed because the story which the positivist writer tells, such as it is, is obvious. The story he or she tells is usually a bad one, and its being obvious only means that it is familiar.

You do not attain to knowledge by remaining on the shore and watching the foaming waves, you must make the venture and cast yourself in, you must swim, alert and with all your force, even if a moment comes when you think you are losing consciousness; in this way, and in no other, do you reach anthropological insight.

If you press me to say why I loved him, I can say no more than it was because he was he, and I was I. Variants: If a man urge me to tell wherefore I loved him, I feel it cannot be expressed but by answering: Because it was he, because it was myself. If a man should importune me to give a reason why I loved him, I find it could no otherwise be expressed, than by making answer: because it was he, because it was I.

I see a clock, but I cannot envision the clockmaker. The human mind is unable to conceive of the four dimensions, so how can it conceive of a God, before whom a thousand years and a thousand dimensions are as one?

I have often admired the mystical way of Pythagoras, and the secret Magic of numbers.

The second requirement of a virus-friendly environment - that it should obey a program of coded instructions - is again only quantitatively less true for brains than for cells or computers. We sometimes obey orders from one another, but also we sometimes don't. Nevertheless, it is a telling fact that, the world over, the vast majority of children follow the religion of their parents rather than any of the other available religions. Instructions to genuflect, to bow towards Mecca, to nod one's head rhythmically towards the wall, to shake like a maniac, to "speak in tongues" - the list of such arbitrary and pointless motor patterns offered by religion alone is extensive - are obeyed, if not slavishly, at least with some reasonably high statistical probability.

The world is divided into men who have wit and no religion and men who have religion and no wit.

In the state of nature, Profit is the measure of Right.

The true Gospel has it that we are justified by faith alone, without the deeds of the Law.

World War I a railway war of centralization and encirclement. World War II a radio war of decentralization concluded by the Bomb. World War III a TV guerrilla war with no divisions between civil and military fronts.

A prating barber asked Archelaus how he would be trimmed. He answered, "In silence."

Sex is no longer a serious taboo. Teenagers sometimes know more about it than adults.

I am not virtuous. Our sons will be if we shed enough blood to give them the right to be.

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

Suffering exists only because it was good for our genes. Conditionally-activated negative emotions were fitness-enhancing in the ancestral environment. In the current era, apologists for mental pain are serving as the innocent mouthpieces of the nasty bits of code which spawned them.

Let us be understood. If the Japanese surrender after the destruction of Hiroshima, having been intimidated, we will rejoice. But we refuse to see anything in such grave news other than the need to argue more energetically in favor of a true international society, in which the great powers will not have superior rights over small and middle-sized nations, where such an ultimate weapon will be controlled by human intelligence rather than by the appetites and doctrines of various states. Before the terrifying prospects now available to humanity, we see even more clearly that peace is the only goal worth struggling for. This is no longer a prayer but a demand to be made by all peoples to their governments a demand to choose definitively between hell and reason.

Joy! Joy! I did not know that all this world is so much part of me, that we are all one army, that windflowers and stars struggle to right and left of me and do not know me; but I turn to them and hail them. The Universe is warm, beloved, familiar, and it smells like my own body. It is Love and War both, a raging restlessness, persistence and uncertainty. Uncertainty and terror. In a violent flash of lightning I discern on the highest peak of power the final, the most fearful pair embracing: Terror and Silence. And between them, a Flame.

Virtue is reason which has become energy.

Even a statement very close to the periphery can be held true in the face of recalcitrant experience by pleading hallucination or by amending certain statements of the kind called logical laws. Conversely, by the same token, no statement is immune to revision. Revision even of the logical law of the excluded middle has been proposed as a means of simplifying quantum mechanics; and what difference is there in principle between such a shift and the shift whereby Kepler superseded Ptolemy, or Einstein Newton, or Darwin Aristotle?

Our plans miscarry because they have no aim. When a man does not know what harbour he is making for, no wind is the right wind.