There are clear cases in which "understanding" literally applies and clear cases in which it does not apply; and these two sorts of cases are all I need for this argument.

Thus mathematics may be defined as the subject in which we never know what we are talking about, nor whether what we are saying is true.

The Science of Hydrostatics depends upon the Fundamental Principle that 'fluids press equally in all directions'. This Principle necessarily results from the conception of a Fluid, as a body of which the parts are perfectly moveable in all directions. For since the Fluid is a body, it can transmit pressure; and the transmitted pressure is equal to the original pressure, in virtue of the Axiom that Reaction is equal to Action. That the Fundamental Principle is not derived from experience, is plain both from its evidence and from its history.

Keep on, then, seeking first the Kingdom and his righteousness, and all these other things will be added to you. So never be anxious about the next day, for the next day will have its own anxieties. Each day has enough of its own troubles.

A common mortal periodically selected by his fellow-citizens to watch over their own interests, can never be supposed to possess this stupendous virtue.

Cities are, first of all, seats of the highest economic division of labor. They produce thereby such extreme phenomena as in Paris the remunerative occupation of the quatorzième. They are persons who identify themselves by signs on their residences and who are ready at the dinner hour in correct attire, so that they can be quickly called upon if a dinner party should consist of thirteen persons. In the measure of its expansion, the city offers more and more the decisive conditions of the division of labor. It offers a circle which through its size can absorb a highly diverse variety of services.

It is a sign of wisdom to be able to use parrhesia without falling into the garrulousness of athuroglossos... One of the problems... how to distinguish that which must be said from that which should be kept silent.

It is precisely because we can destroy that we are under an obligation to know why we ought not to do it, and to summon those countervailing powers that curb our destructive capacity. Nonviolence becomes an ethical obligation by which we are bound precisely because we are bound to one another; it may well be an obligation against which we rail, in which ambivalent swings of the psyche make themselves known, but the obligation to preserve the social bond can be resolved upon without precisely resolving that ambivalence. The obligation not to destroy each other emerges from, and reflects, the vexed social form of our lives, and it leads us to reconsider whether self-preservation is not linked to preserving the lives of others.

I am firmly convinced, as I have already said, that to effect any great social improvement, it is sympathy rather than self-interest, the sense of duty rather than the desire for self-advancement, that must be appealed to. Envy is akin to admiration, and it is the admiration that the rich and powerful excite which secures the perpetuation of aristocracies.

If beings are grasped as will to power, the "should" which is supposed to hang suspended over them, against which they might be measured, becomes superfluous. If life itself is will to power, it is itself the ground, principium, of valuation. Then a "should" does not determine being. Being determines a "should." "When we talk of values we are speaking under the inspiration or optics of life: life itself compels us to set up values; life itself values through us whenever we posit values."

There is no wish more natural than the wish to know.

It is best to bear what cannot be changed.

A real subjection is born mechanically from a fictitious relation. So it is not necessary to use force to constrain the convict to good behavior, the madman to calm, the worker to work, the schoolboy to application, the patient to the observation of the regulations.

I should prefer that Fortune keep me in her camp rather than in the lap of luxury. If I am tortured, but bear it bravely, all is well; if I die, but die bravely, it is also well.

A good marriage would be between a blind wife and a deaf husband.

I live in the Managerial Age, in a world of "Admin." The greatest evil is not now done in those sordid "dens of crime" that Dickens loved to paint. It is not done even in concentration camps and labour camps. In those we see its final result. But it is conceived and ordered (moved, seconded, carried, and minuted) in clean, carpeted, warmed, and well-lighted offices, by quiet men with white collars and cut fingernails and smooth-shaven cheeks who do not need to raise their voice. Hence, naturally enough, my symbol for Hell is something like the bureaucracy of a police state or the offices of a thoroughly nasty business concern.

I think that when friendship and perception of kinship ruled everything, no one killed any creature, because people thought the other animals were related to them.

I believe that the nature of man is a contradiction rooted in the conditions of human existence that requires a search for solutions, which in their turn create new contradictions and now the need for answers. I believe that every answer to these contradictions can really satisfy the condition of helping man to overcome the sense of separation and to achieve a sense of agreement, of unity, and of belonging. I believe that in every answer to these contradictions, man has the possibility of choosing only between going forward or going back; these choices, which are translated into specific actions, are means toward the regressing or toward the progressing of the humanity that is in us.

The great thing, then, in all education, is to make our nervous system our ally instead of our enemy.

I am looking forward very much to getting back to Cambridge, and being able to say what I think and not to mean what I say: two things which at home are impossible. Cambridge is one of the few places where one can talk unlimited nonsense and generalities without anyone pulling one up or confronting one with them when one says just the opposite the next day.

All agreed in rejecting that blasphemy, that Greece was ever a province of Asia, that the Greek spirit, so free, so objective, so limpid, could contain any element of the vague and obscure spirit of the Orient.

No government ought to be without censors; and where the press is free no one ever will.

The words of malicious slander should not be allowed to enter the ear. A defensive voice should not be allowed to come out of the mouth. The want to gravely injure people should not be allowed to exist in the heart. If this is accomplished, though there be people who cynically expose others, they would be without people who would align with them.

The more man ascends through the past, and the more he launches into the future, the greater he will be, and all these philosophers and ministers and truth-telling men who have fallen victims to the stupidity of nations, the atrocities of priests, the fury of tyrants, what consolation was left for them in death? This: That prejudice would pass, and that posterity would pour out the vial of ignominy upon their enemies. O Posterity! Holy and sacred stay of the unhappy and the oppressed; thou who art just, thou who art incorruptible, thou who findest the good man, who unmaskest the hypocrite, who breakest down the tyrant, may thy sure faith, thy consoling faith never, never abandon me!

Rational and kindly behavior tends to produce good results and these results remain good even when the behavior which produced them was itself produced by a pill.

The power of the periodical press is second only to that of the people.

That is why St. John of the Cross calls faith a night. With those who have received a Christian education, the lower parts of the soul become attached to these mysteries when they have no right at all to do so. That is why such people need a purification of which St. John of the Cross describes the stages. Atheism and incredulity constitute an equivalent of such a purification.

Every individual is a unique manifestation of the Whole, as every branch is a particular outreaching of the tree. To manifest individuality, every branch must have a sensitive connection with the tree, just as our independently moving and differentiated fingers must have a sensitive connection with the whole body. The point, which can hardly be repeated too often, is that differentiation is not separation. The head and the feet are different, but not separate, and though man is not connected to the universe by exactly the same physical relation as branch to tree or feet to head, he is nonetheless connected-and by physical relations of fascinating complexity. The death of the individual is not disconnection but simply withdrawal. The corpse is like a footprint or an echo-the dissolving trace of something which the Self has ceased to do.

The greatest thing in the world is to know how to belong to oneself.

Few men have been admired by their own households.

Man, little as he may suppose it, is necessitated to obey superiors. He is a social being in virtue of this necessity; nay he could not be gregarious otherwise. He obeys those whom he esteems better than himself, wiser, braver; and will forever obey such; and even be ready and delighted to do it.

People nowadays think that scientists exist to instruct them, poets, musicians, etc. to give them pleasure. The idea that these have something to teach them - that does not occur to them.

I have in general no very exalted opinion of the virtue of paper government.

At the present stage in the development of the art of war, there is only way of coping with them, and that is to keep out of war. In all the densely populated countries of Western Europe, it seems almost certain that, within a few days of the outbreak of war, panic will seize the surviving inhabitants of the capitals and the industrial areas, leading to anarchy, starvation, and paralysis of all warlike effort. The only sensible course, therefore, is to prevent war if possible, and to remain neutral if war occurs.

In a free society the state does not administer the affairs of men. It administers justice among men who conduct their own affairs.

I never will, by any word or act, bow to the shrine of intolerance, or admit a right of inquiry into the religious opinions of others.

A man should be upright, not kept upright.

When the leaders choose to make themselves bidders at an auction of popularity, their talents, in the construction of the state, will be of no service. They will become flatterers instead of legislators; the instruments, not the guides, of the people.

Hear, and understand: Not that which goeth into the mouth defileth a man; but that which cometh out of the mouth, this defileth a man.

One who liberates his country by killing a tyrant is to be praised and rewarded.

Thank you for your letter and for the enclosure which I return herewith. I have been wondering whether there is any means of preventing the confusion between you and me, and I half-thought that we might write a joint letter to The Times in the following terms: Sir, To prevent the continuation of confusions which frequently occur, we beg to state that neither of us is the other. Do you think this would be a good plan?

Eat not the heart.

Greed is a bottomless pit which exhausts the person in an endless effort to satisfy the need without ever reaching satisfaction.

No man can visualize four dimensions, except mathematically ... I think in four dimensions, but only abstractly. The human mind can picture these dimensions no more than it can envisage electricity. Nevertheless, they are no less real than electro-magnetism, the force which controls our universe, within, and by which we have our being.