The vitality of thought is in adventure. Ideas won't keep. Something must be done about them. When the idea is new, its custodians have fervor, live for it, and, if need be, die for it.

Nothing can be of more importance than to separate prejudice and mistake on the one hand from reason and demonstration on the other.

If there be light, then there is darkness; if cold, heat; if height, depth; if solid, fluid; if hard, soft; if rough, smooth; if calm, tempest; if prosperity, adversity; if life, death.

Be ruled by time, the wisest counsellor of all.

I assert, that the ancient Whigs held doctrines, totally different from those I have last mentioned. I assert, that the foundations laid down by the Commons, on the trial of Doctor Sacheverel, for justifying the revolution of 1688, are the very same laid down in Mr. Burke's Reflections; that is to say,-a breach of the original contract, implied and expressed in the constitution of this country, as a scheme of government fundamentally and inviolably fixed in King, Lords, and Commons.-That the fundamental subversion of this antient constitution, by one of its parts, having been attempted, and in effect accomplished, justified the Revolution. That it was justified only upon the necessity of the case; as the only means left for the recovery of that antient constitution, formed by the original contract of the British state; as well as for the future preservation of the same government. These are, the points to be proved.

For a man to love again where he is loved, it is the charity of publicans contracted by mutual profit and good offices; but to love a man's enemies is one of the cunningest points of the law of Christ, and an imitation of the divine nature.

Gold is now money with reference to all other commodities only because it was previously, with reference to them, a simple commodity.

Rest gives relish to labour.

In the same manner as we are cautioned by religion to show our faith by our works we may very properly apply the principle to philosophy, and judge of it by its works; accounting that to be futile which is unproductive, and still more so, if instead of grapes and olives it yield but the thistle and thorns of dispute and contention.

So much of modern mathematical work is obviously on the border-line of logic, so much of modern logic is symbolic and formal, that the very close relationship of logic and mathematics has become obvious to every instructed student. The proof of their identity is, of course, a matter of detail: starting with premisses which would be universally admitted to belong to logic, and arriving by deduction at results which as obviously belong to mathematics, we find that there is no point at which a sharp line can be drawn, with logic to the left and mathematics to the right. If there are still those who do not admit the identity of logic and mathematics, we may challenge them to indicate at what point, in the successive definitions and deductions of Principia Mathematica, they consider that logic ends and mathematics begins. It will then be obvious that any answer must be quite arbitrary.

As money grows, care follows it and the hunger for more.

Every philosophical problem, when it is subjected to the necessary analysis and justification, is found either to be not really philosophical at all, or else to be, in the sense in which we are using the word, logical.

All the concessions we make to Eros are holes in our desire for the absolute.

Men are at variance with the one thing with which they are in the most unbroken communion, the reason that administers the whole universe.

Parmenides: I was pleased with you, Socrates, because you would not discuss the doubtful question in terms of visible objects or in relation to them, but only with reference to what we conceive most entirely by the intellect and may call ideas… But if you wish to get better training, you must do something more than that; you must consider not only what happens if a particular hypothesis is true, but also what happens if it is not true.

Bad company will lead a man to the gallows!

Man has ever expressed some symbolical Philosophy of his Being in his Works and Conduct; he announces himself and his Gospel of Nature; he is the Messiah of Nature.

Till society is very differently constituted, parents, I fear, will still insist on being obeyed, because they will be obeyed, and constantly endeavour to settle that power on a Divine right, which will not bear the investigation of reason.

Nature forms us for ourselves, not for others; to be, not to seem.

For those endowed with insight there is in reality no object of love but God, nor does anyone but He deserve love Love, Longing, Intimacy and Contentment.

Speciesism-the word is not an attractive one, but I can think of no better term-is a prejudice or attitude of bias in favor of the interests of members of one's own species and against those of members of other species.

It is truly a marvelous thing to consider to what greatness Athens arrived in the space of one hundred years after she freed herself from the tyranny of Pisistratus; but, above all, it is even more marvelous to consider the greatness Rome reached when she freed herself from her kings. The reason is easy to understand, for it is the common good and not private gain that makes cities great. Yet, without a doubt, this common good is observed only in republics, for in them everything that promotes it is practised, and however much damage it does to this or that private individual, those who benefit from the said common good are so numerous that they are able to advance in spite of the inclination of the few citizens who are oppressed by it.

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

The Athenians are right to accept advice from anyone, since it is incumbent on everyone to share in that sort of excellence, or else there can be no city at all.

The unbeliever walks for a quadrillion miles, yet one moments of reality makes up for it.

Faith which does not doubt is dead faith.

The best people renounce all for one goal, the eternal fame of mortals; but most people stuff themselves like cattle. For what sense or understanding have they? They follow minstrels and take the multitude for a teacher, not knowing that many are bad and few good. For the best men choose one thing above all immortal glory among mortals; but the masses stuff themselves like cattle.

Self-respect will keep a man from being abject when he is in the power of enemies, and will enable him to feel that he may be in the right when the world is against him.

Man's life cannot "be lived" by repeating the pattern of his species; he must live. Man is the only animal that can be bored, that can be discontented, that can feel evicted from paradise. Man is the only animal for whom his own existence is a problem which he has to solve and from which he cannot escape. He cannot go back to the prehuman state of harmony with nature; he must proceed to develop his reason until he becomes the master of nature, and of himself.

It is requisite to defend those who are unjustly accused of having acted injuriously, but to praise those who excel in a certain good.

For nature beats in perfect tune, And rounds with rhyme her every rune, Whether she work in land or sea, Or hide underground her alchemy. Thou canst not wave thy staff in air, Or dip thy paddle in the lake, But it carves the bow of beauty there, And the ripples in rhymes the oar forsake.

Is there anything we cannot contrive to call the demands of the times, and is there anything that does not acquire a certain prestige by being the demand of the times? But for decisive religious categories to become the demand for the times is eo ipso a contradiction. “The times” is too abstract a category to be able as claimant to demand the decisive religious categories that belong specifically to individuality and particularity; loud collective demands en mass for what can be shared only by the single individual in particularity, in solitariness, in silence, cannot be made.

What place do we occupy in the "universe"? A point, if that! Why reproach ourselves when we are evidently so insignificant? Once we make this observation, we grow calm at once: henceforth, no more bother, no more frenzy, metaphysical or otherwise. And then that point dilates, swells, substitutes itself for space. And everything begins all over again.

The superior man, while there is anything he has not studied, or while in what he has studied there is anything he cannot understand, Will not intermit his labor. While there is anything he has not inquired about, or anything in what he has inquired about which he does not know, he will not intermit his labor. While there is anything which he has not reflected on, or anything in what he has reflected on which he does not apprehend, he will not intermit his labor. While there is anything which he has not discriminated or his discrimination is not clear, he will not intermit his labor. If there be anything which he has not practiced, or his practice fails in earnestness, he will not intermit his labor. If another man succeed by one effort, he will use a hundred efforts. If another man succeed by ten efforts, he will use a thousand. Let a man proceed in this way, and, though dull, he will surely become intelligent; though weak, he will surely become strong.

They who bow to the enemy abroad will not be of power to subdue the conspirator at home.

With a foolish man make no dispute.

This Europe, which in its ruinous blindness is forever on the point of cutting its own throat, lies today in a great pincers, squeezed between Russia on one side and America on the other. From a metaphysical point of view, Russia and America are the same: the same dreary technological frenzy, the same unrestricted organization of the average man...

To be a good mother - a woman must have sense, and that independence of mind which few women possess who are taught to depend entirely on their husbands. Meek wives are, in general, foolish mothers; wanting their children to love them best, and take their part, in secret, against the father, who is held up as a scarecrow.

Beings who are so uniquely constituted must necessarily express themselves in other ways than ordinary men. It is impossible that with souls so differently modified, they should not carry over into the expression of their feelings and ideas the stamp of those modifications.

[One thing] underpins, makes consistent, and gives meaning to all our other activities on behalf of animals. This one thing is that we take responsibility for our own lives, and make them as free of cruelty as we can. The first step is that we cease to eat animals. Many people who are opposed to cruelty to animals draw the line at becoming a vegetarian. It was of such people that Oliver Goldsmith, the eighteenth-century humanitarian essayist, wrote: "They pity, and they eat the objects of their compassion."

We ought neither to fasten our ship to one small anchor nor our life to a single hope.

What can be said can and should always be said more and more simply and clearly.

There are two equal and opposite errors into which our race can fall about the devils. One is to disbelieve in their existence. The other is to believe, and to feel an excessive and unhealthy interest in them. They themselves are equally pleased by both errors and hail a materialist or a magician with the same delight.

The happiness which belongs to man, is that state in which he enjoys as many of the good things, and suffers as few of the evils incident to human nature as possible; passing his days in a smooth course of permanent tranquility. A wise man, though deprived of sight or hearing, may experience happiness in the enjoyment of the good things which yet remain; and when suffering torture, or laboring under some painful disease, can mitigate the anguish by patience, and can enjoy, in his afflictions, the consciousness of his own constancy.

Blessed are the hearts that can bend; they shall never be broken.

Great feelings take with them their own universe, splendid or abject. They light up with their passion an exclusive world in which they recognize their climate. There is a universe of jealousy, of ambition, of selfishness or generosity. A universe in other words a metaphysic and an attitude of mind.

It comes, it comes!' they sang. 'Sleepers awake! It comes, it comes, it comes.' One dreadful glance over my shoulder I essayed - not long enough to see (or did I see?) the rim of the sunrise that shoots Time dead with golden arrows and puts to flight all phantasmal shapes. Screaming, I buried my face in the fold of the Teacher's robe. 'The morning! The morning!' I cried. 'I am caught by the morning and I am a ghost.'

Understanding finds nothing but itself when it seeks the essence behind the appearance of things. 'It is manifest that behind the so-called curtain, which is to hide the inner world, there is nothing to be seen unless we ourselves go behind there, as much in order that we may thereby see, as that there may be something behind there which can be seen.'