The number 2 thought of by one man cannot be added to the number 2 thought of by another man so as to make up the number 4.

In training a child to activity of thought, above all things we must beware of what I will call "inert ideas"-that is to say, ideas that are merely received into the mind without being utilised, or tested, or thrown into fresh combinations.In the history of education, the most striking phenomenon is that schools of learning, which at one epoch are alive with a ferment of genius, in a succeeding generation exhibit merely pedantry and routine. The reason is, that they are overladen with inert ideas. Education with inert ideas is not only useless: it is, above all things, harmful.

There is only this swarm of dying creatures stricken with longevity, all the more hateful in that they are so good at organizing their agony. p. 120, first American edition

How abundantly do spiritual beings display the powers that belong to them! We look for them, but do not see them; we listen to, but do not hear them; yet they enter into all things, and there is nothing without them.

Soul, indeed, is a certain medium between an impartible essence, and an essence which is divisible about bodies. But intellect is an impartible essence alone. And qualities and material forms are divisible about bodies. Not everything which acts on another, effects that which it does effect by approximation and contact; but those natures which effect any thing by approximation and contact, use approximation accidentally.

Our whole civilization, our entire culture is concentrated in the mad demand for the most perfected weapons of slaughter. Ammunition! Ammunition! O, Lord, thou who rulest heaven and earth, thou God of love, of mercy and of justice, provide us with enough ammunition to destroy our enemy. Such is the prayer which is ascending daily to the Christian heaven.

History is not like some individual person, which uses men to achieve its ends. History is nothing but the actions of men in pursuit of their ends.

Friends, the soil is poor, we must sow seeds in plenty for us to garner even modest harvests.

Man has many wishes that he does not really wish to fulfil, and it would be a misunderstanding to suppose the contrary. He wants them to remain wishes, they have value only in his imagination; their fulfilment would be a bitter disappointment to him. Such a desire is the desire for eternal life. If it were fulfilled, man would become thoroughly sick of living eternally, and yearn for death. In reality man wishes merely to avoid a premature, violent or gruesome death. Everything has its measure, says a pagan philosopher; in the end we weary of everything, even of life; a time comes when man desires death. Consequently there is nothing frightening about a normal, natural death, the death of a man who has fulfilled himself and lived out his life.

I discuss with myself questions of politics, love, taste, or philosophy. I let my mind rove wantonly, give it free rein to follow any idea, wise or mad that may present itself. ... My ideas are my harlots.

Love is a contradiction if there is no God.

That all men are equal is a proposition which at ordinary times no sane individual has ever given his assent.

To get up in the morning, wash and then wait for some unforeseen variety of dread or depression. I would give the whole universe and all of Shakespeare for a grain of ataraxy.

The spurious axioms of the third kind from conditions proper to the subject whence they are transferred rashly to the object are plentiful, not, as in those of the Second Class, because the only way to the intellectual concept lies through the sensuous data, but because only by aid of the latter can the concept be applied to that which is given by experience, that is, can we know whether something is contained under a certain intellectual concept or not. To this class belongs the threadbare one of the schools: whatever exists contingently does at some time not exist. This spurious principle springs from the poverty of the intellect, having insight frequently into the nominal, rarely into the real, marks of contingency or necessity.

There may be a rationalist who has never wavered in his conviction of the mortality of the soul, and there may be a vitalist who has never wavered in his faith in immortality; but at the most this would prove that just as there are natural monstrosities, so there are those who are stupid as regards heart and feeling, however great their intelligence, and those who are stupid intellectually, however great their virtue. But, in normal cases, I cannot believe those who assure me that never, not in a fleeting moment, not in the hours of direst loneliness and grief, has this murmur of uncertainty breathed upon their consciousness.

I accept nothing on authority. A hypothesis must be backed by reason, or else it is worthless.

I say, it is the everlasting privilege of the foolish to be governed by the wise; to be guided in the right path by those who know it better than they. This is the first "right of man;" compared with which all other rights are as nothing.

How much education may reconcile young people to pain and sufference, the examples of Sparta do sufficiently shew; and they who have once brought themselves not to think bodily pain the greatest of evils, or that which they ought to stand most in fear of, have made no small advance toward virtue.

That a woman is presented as a teacher, as a prototype of piety, cannot amaze anyone who knows that piety or godliness is fundamentally womanliness. ... from a woman you learn concern for the one thing needful, from Mary, sister of Lazarus, who sat silent at Christ's feet with her heart's choice: the one thing needful.

So long as man remains free he strives for nothing so incessantly and so painfully as to find someone to worship. But man seeks to worship what is established beyond dispute, so that all men would agree at once to worship it. For these pitiful creatures are concerned not only to find what one or the other can worship, but to find community of worship is the chief misery of every man individually and of all humanity from the beginning of time. For the sake of common worship they've slain each other with the sword. They have set up gods and challenged one another, 'Put away your gods and come and worship ours, or we will kill you and your gods!' And so it will be to the end of the world, even when gods disappear from the earth; they will fall down before idols just the same.

All the entertainment and talk of history is nothing almost but fighting and killing: and the honour and renown that is bestowed on conquerers (who for the most part are but the great butchers of mankind) farther mislead growing youth, who by this means come to think slaughter the laudible business of mankind, and the most heroick of virtues. By these steps unnatural cruelty is planted in us; and what humanity abhors, custom reconciles and recommends to us, by laying it in the way to honour. Thus, by fashioning and opinion, that comes to be a pleasure, which in itself neither is, nor can be any.

Lord, give me the capacity of never praying, spare me the insanity of all worship, let this temptation of love pass from me which would deliver me forever unto You. Let the void spread between my heart and heaven! I have no desire to people my deserts by Your presence, to tyrannize my nights by Your light, to dissolve my Siberias beneath Your sun.

What I give is the morphology of the use of an expression. I show that it has kinds of uses of which you had not dreamed. In philosophy one feels forced to look at a concept in a certain way. What I do is suggest, or even invent, other ways of looking at it. I suggest possibilities of which you had not previously thought. You thought that there was one possibility, or only two at most. But I made you think of others. Furthermore, I made you see that it was absurd to expect the concept to conform to those narrow possibilities. Thus your mental cramp is relieved, and you are free to look around the field of use of the expression and to describe the different kinds of uses of it.

Credulity in arts and opinions is likewise of two kinds viz., when men give too much belief to arts themselves, or to certain authors in any art. The sciences that sway the imagination more than the reason are principally three viz., astrology, natural magic, and alchemy. Alchemy may be compared to the man who told his sons that he had left them gold, buried somewhere in his vineyard; while they by digging found no gold, but by turning up the mould about the roots of the vines procured a plentiful vintage. So the search and endeavours to make gold have brought many useful inventions to light.

It is proof of a base and low mind for one to wish to think with the masses or majority, merely because the majority is the majority. Truth does not change because it is, or is not, believed by a majority of the people.

To be honest, I was somewhat disappointed... It's had effects around the margins, of course, but they have mostly been minor. When I wrote it, I really thought the book would change the world. I know it sounds a little grand now, but at the time the sixties still existed for us. It looked as if real changes were possible, and I let myself believe that this would be one of them. All you have to do is walk around the corner to McDonald's to see how successful I have been.

Every tax, however, is to the person who pays it a badge, not of slavery but of liberty. It denotes that he is a subject to government, indeed, but that, as he has some property, he cannot himself be the property of a master.

Brothers, love is a teacher; but one must know how to acquire it, for it is hard to acquire, it is dearly bought, it is won slowly by long labour. For we must love not only occasionally, for a moment, but for ever. Everyone can love occasionally, even the wicked can.

So the Church too, like Mary, enjoys perpetual virginity and uncorrupted fecundity.

My love, Alcibiades, which I hardly like to confess, would long ago have passed away, as I flatter myself, if I saw you loving your good things, or thinking that you ought to pass life in the enjoyment of them. Socrates speaking to Alcibiades

When navigators... determine a longitude... they must... calculate Paris time…with a chronometer set for Paris. The qualitative problem of simultaneity is made to depend upon the quantitative problem of the measurement of time.

There is no body but eats and drinks. But they are few who can distinguish flavors.

The most momentous thing in human life is the art of winning the soul to good or to evil.

We can pool information about experiences, but never the experiences themselves. From family to nation, every human group is a society of island universes.

Praise be to God with all due praise, and a prayer for Muhammad His chosen servant and apostle. The purpose of this treatise is to examine, from the standpoint of the study of the Law, whether the study of philosophy and logic is allowed by the Law, or prohibited, or commanded either by way of recommendation or as obligatory.

It is easy to see that this problem can be solved neither in theoretical nor in practical philosophy, but only in a higher discipline, which is the link that combines them, and neither theoretical nor practical, but both at once.

Life is just a notebook with blank pages. Every time we make a mistake, the pages get stained and living in it becomes impossible.

The labour-power is a commodity, not capital, in the hands of the labourer, and it constitutes for him a revenue so long as he can continuously repeat its sale; it functions as capital after its sale, in the hands of the capitalist, during the process of production itself.

It is impossible to imagine a more dramatic and horrifying combination of scientific triumph with political and moral failure than has been shown to the world in the destruction of Hiroshima. From the scientific point of view, the atomic bomb embodies the results of a combination of genius and patience as remarkable as any in the history of mankind.

Freedom is what you do with what's been done to you.

Freedom of Men under Government is, to have a standing Rule to live by, common to every one of that Society, and made by the Legislative Power erected in it; a Liberty to follow my own Will in all things, where the Rule prescribes not; and not to be subject to the inconstant, uncertain, unknown, Arbitrary Will of another Man: as Freedom of Nature is, to be under no other restraint but the Law of Nature.

Most people would sooner die than think; in fact, they do so.

Very often the things that cost nothing cost us the most heavily; I can show you many objects the quest and acquisition of which have wrested freedom from our hands.

A right exists in theory... All human beings have the same set of rights, but rights need to be enforced by the state. It needs to rely on the coercive power of the state... its army, its police force, to actually make those rights something real that citizens can enjoy, and the enforcement power is not universal. ...We wouldn't want to live in a world in which every liberal state wanted to enforce liberal rights in every other state in the world.

Just because science can't in practice explain things like the love that motivates a poet to write a sonnet, that doesn't mean that religion can. It's a simple and logical fallacy to say, 'If science can't do something, therefore religion can'.

It is amusing to hear the modern Christian telling you how mild and rationalistic Christianity really is and ignoring the fact that all its mildness and rationalism is due to the teaching of men who in their own day were persecuted by all orthodox Christians.

Democracy does not contain any force which will check the constant tendency to put more and more on the public payroll. The state is like a hive of bees in which the drones display, multiply and starve the workers so the idlers will consume the food and the workers will perish.

To hope is to contradict the future.