We shall, therefore, assume the complete physical equivalence of a gravitational field and a corresponding acceleration of the reference system.

To recognize a difficulty is not to solve it.

Ye fools, did not he that made that which is without make that which is within also?

The great fault of all ethics hitherto has been that they believed themselves to have to deal only with the relations of man to man. In reality, however, the question is what is his attitude to the world and all life that comes within his reach. A man is ethical only when life, as such, is sacred to him, and that of plants and animals as that of his fellow men, and when he devotes himself helpfully to all life that is in need of help. Only the universal ethic of the feeling of responsibility in an ever-widening sphere for all that lives - only that ethic can be founded in thought. ... The ethic of Reverence for Life, therefore, comprehends within itself everything that can be described as love, devotion, and sympathy whether in suffering, joy, or effort.

A man must be a little mad if he does not want to be even more stupid.

To imply by the word "terrorism" that this sort of terror is the work exclusively of "terrorists" is misleading. The "legitimate" warfare of technologically advanced nations likewise is premeditated, politically motivated violence perpetrated against innocents. The distinction between the intention to perpetrate violence against innocents, as in "terrorism," and the willingness to do so, as in "war," is not a source of comfort.

We never know, believe me, when we have succeeded best.

You will die, not because you are ill, but because you are alive; even when you have been cured, thesame end awaits you; when you have recovered, it will be not death, but ill health, that you have escaped.

The community has no bribe that will tempt a wise man. You may raise money enough to tunnel a mountain, but you cannot raise money enough to hire a man who is minding his own business. An efficient and valuable man does what he can, whether the community pay him for it or not. The inefficient offer their inefficiency to the highest bidder, and are forever expecting to be put into office. One would suppose that they were rarely disappointed.

Anything can be made to look good or bad by being redescribed.

We assert then that nothing has been accomplished without interest on the part of the actors; and - if interest be called passion, inasmuch as the whole individuality, to the neglect of all other actual or possible interests and claims, is devoted to an object with every fibre of volition, concentrating all its desires and powers upon it - we may affirm absolutely that nothing great in the World has been accomplished without passion. Often abbreviated to: Nothing great in the World has been accomplished without passion. Variant translation: We may affirm absolutely that nothing great in the world has ever been accomplished without enthusiasm.

Death is the dark backing that a mirror needs if we are to see anything.

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.

The way positive reinforcement is carried out is more important than the amount.

The law will never make men free; it is men who have got to make the law free.

No doubt markets transmit information in the way that Hayek claimed. But what reason is there to believe that - unlike any other social institution - they have a built-in capacity to correct their mistakes? History hardly supports the supposition. Moods of irrational exuberance and panic can, and often do, swamp the price-discovery functions of markets.

The mystery is that the world is at it is -- a mystery that is the source of all joy and all sorrow, of all hope and fear, and the source of development both creative and degenerative. The contingency of all into which time enters is the source of pathos, comedy, and tragedy.

The violence of love is as much to be dreaded as that of hate. When it is durable, it is serene and equable. Even its famous pains begin only with the ebb of love, for few are indeed lovers, though all would fain be.

Whoever will be free must make himself free. Freedom is no fairy gift to fall into a man's lap. What is freedom? To have the will to be responsible for one's self.

A person who doesn't know what the universe is doesn't know who they are. A person who doesn't know their purpose in life doesn't know who they are or what the universe is. A person who doesn't know any of these things doesn't know why they are here. So what to make of people who seek or avoid the praise of those who have no knowledge of where or who they are?

Whereas economic man maximizes - selects the best alternative from among all those available to him, his cousin, administrative man, satisfices - looks for a course of action that is satisfactory or "good enough."

In his Experiment in Autobiography (1934), H.G. Wells pointed out that ever since the beginning of life, most creatures have been 'up against it'. Their lives are a drama of struggle against the forces of nature. Yet nowadays you can say to a man: Yes, you earn a living, you support a family, you love and hate, but -- what do you do? His real interest may be in something else -- art, science, literature, philosophy. The bird is a creature of the air, the fish is a creature of the water, and man is a creature of the mind.

If sovereignty is not anterior to a people, at least these two ideas are collateral, since it takes a sovereign to make a people. It is as impossible to imagine a human society without a sovereign as a hive and a swarm without a queen, for a swarm, in virtue of the eternal laws of nature, exists in this way or it does not exist.

While moral rules may be propounded by authority the fact that these were so propounded would not validate them.

If the king loves music, there is little wrong in the land.

Yet there is a certain solitude like no other - that of the man preparing his meal in public on a wall, or on the hood of his car, or along a fence, alone. You see that all the time here. It is the saddest sight in the world. Sadder than destitution, sadder than the beggar is the man who eats alone in public. Nothing more contradicts the laws of man or beast, for animals always do each other the honour of sharing or disputing each other's food. He who eats alone is dead (but not he who drinks alone. Why is this?).

Religion is the dream of the human mind. But even in dreams we do not find ourselves in emptiness or in heaven, but on earth, in the realm of reality; we only see real things in the entrancing splendor of imagination and caprice, instead of in the simple daylight of reality and necessity.

Nothing becomes so offensive so quickly as grief. When fresh it finds someone to console it, but when it becomes chronic, it is ridiculed and rightly.

Lamachus chid a captain for a fault; and when he had said he would do so no more, "Sir," said he, "in war there is no room for a second miscarriage." Said one to Iphicrates, "What are ye afraid of?" "Of all speeches," said he, "none is so dishonourable for a general as 'I should not have thought of it.'"

Where we find a difficulty we may always expect that a discovery awaits us. Where there is cover we hope for game.

It is worth observing, how we feel ourselves affected in reading the characters of Cæsar, and Cato, as they are so finely drawn and contrasted in Salust. In one, the ignoscendo, largiundo; in the other, nil largiundo. In one, the miseris perfugium; in the other, malis perniciem. In the latter we have much to admire, much to reverence, and perhaps something to fear; we respect him, but we respect him at a distance. The former makes us familiar with him; we love him, and he leads us whither he pleases.

Great men hallow a whole people and lift up all who live in their time.

You have theories enough concerning the Rights of Men. It may not be amiss to add a small degree of attention to their Nature and disposition.

My mission is to see things as they are. Exactly the contrary of a mission.

Accent is the soul of language; it gives to it both feeling and truth.

We believe we are rising because while keeping the same base inclinations (for instance: the desire to triumph over others) we have given them a noble object. We should, on the contrary, rise by attaching noble inclinations to lowly objects.

Whatever is referred to must exist. Let us call this the axiom of existence.

Organizations and institutions provide the general stimuli and attention-directors that channelize the behaviors of the members of the group, and that provide those members with the intermediate objectives that stimulate action.

Genes and culture have co-evolved. But crudely, natural selection "designed" male human primates to hunt nonhumans and build coalitions of other male human primates in order to wage territorial wars of aggression. Nature didn't design us to become a scientific community and collaborate to overcome aging. It's difficult to imagine that any human enemy could inflict such gruesome damage on the victims as growing old. The ravages of aging strike down combatants and civilians alike. So the trillions of dollars that humans currently spend on ways to harm and kill each other ("defence") would be more fruitfully spent on defeating our common enemy. We should work together to build a "Triple S" civilisation of superlongevity, superhappiness and superintelligence.

The progress of human knowledge depends on maintaining that touch of scepticism even about the most "unquestionable" truths. A century ago, Darwin's theory of evolution by natural selection was regarded as scientifically unshakeable; today, most biologists have their reservations about it. Fifty years ago, Freud's sexual theory of neurosis was accepted by most psychiatrists; today, it is widely recognized that his methods were highly questionable. At the turn of this century, a scientist who questioned Newton's theory of gravity would have been regarded as insane; twenty years later, it had been supplanted by Einstein's theory, although, significantly, few people actually understood it. It seems perfectly conceivable that our descendants of the twenty-second century will wonder how any of us could have been stupid enough to have been taken in by Darwin, Freud or Einstein.

Everything exists; nothing exists. Either formula affords a like serenity. The man of anxiety, to his misfortune, remains between them, trembling and perplexed, forever at the mercy of a nuance, incapable of gaining a foothold in the security of being or in the absence of being.

How can even the lowest mind, if he reflects at all the marvels of this earth and sky, the brilliant fashioning of plants and animals, remain blind to the fact that this wonderful world with its settled order must have a maker to design, determine and direct it?

The last peculiarity of consciousness to which attention is to be drawn in this first rough description of its stream is that it is always interested more in one part of its object than in another, and welcomes and rejects, or chooses, all the while it thinks.

...the relatively unconscious man driven by his natural impulses because, imprisoned in his familiar world, he clings to the commonplace, the obvious, the probable, the collectively valid, using for his motto: 'Thinking is difficult. Therefore, let the herd pronounce judgement.'

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.

Yes, so it is that knowledge itself must die in order to blossom forth again in death as will; the freedom of thought, belief, and conscience, these wonderful flowers of three centuries will sink back into the lap of mother earth so that a new freedom, the freedom will, will be nourished with its most noble juices.