Consider that we shouldn't call our brother a fool, since we don't know ourselves what we are.

Animals destitute of reason live with their own kind in a state of social amity. Elephants herd together; sheep and swine feed in flocks; cranes and crows take their flight in troops; storks have their public meetings to consult previously to their emigration, and feed their parents when unable to feed themselves; dolphins defend each other by mutual assistance; and everybody knows, that both ants and bees have respectively established by general agreement, a little friendly community.

Each to each a looking-glass, Reflects his figure that doth pass. Every wayfarer he meets What himself declared repeats, What himself confessed records, Sentences him in his words; The form is his own corporal form, And his thought the penal worm. Yet shine forever virgin minds, Loved by stars and the purest winds, Which, o'er passion throned sedate, Have not hazarded their state; Disconcert the searching spy, Rendering to a curious eye The durance of a granite ledge To those who gaze from the sea's edge. It is there for benefit; It is there for purging light; There for purifying storms; And its depths reflect all forms; It cannot parley with the mean,- Pure by impure is not seen. For there's no sequestered grot, Lone mountain tarn, or isle forgot, But Justice, journeying in the sphere, Daily stoops to harbour there.

In the temple of science are many mansions, and various indeed are they that dwell therein and the motives that have led them thither. Many take to science out of a joyful sense of superior intellectual power; science is their own special sport to which they look for vivid experience and the satisfaction of ambition; many others are to be found in the temple who have offered the products of their brains on this altar for purely utilitarian purposes. Were an angel of the Lord to come and drive all the people belonging to these two categories out of the temple, the assemblage would be seriously depleted, but there would still be some men, of both present and past times, left inside. Our Planck is one of them, and that is why we love him. I am quite aware that we have just now lightheartedly expelled in imagination many excellent men who are largely, perhaps chiefly, responsible for the buildings of the temple of science; and in many cases, our angel would find it a pretty ticklish job to decide. But of one thing I feel sure: if the types we have just expelled were the only types there were, the temple would never have come to be, any more than a forest can grow which consists of nothing but creepers. For these people any sphere of human activity will do if it comes to a point; whether they become engineers, officers, tradesmen, or scientists depends on circumstances.Now let us have another look at those who have found favor with the angel. Most of them are somewhat odd, uncommunicative, solitary fellows, really less like each other, in spite of these common characteristics, than the hosts of the rejected. What has brought them to the temple? That is a difficult question and no single answer will cover it.

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.

God confronts me with terror and love - for I am His only hope - and says: "This Ecstatic, who gives birth to all things, who rejoices in them all and yet destroys them, this Ecstatic is my Son!"

Nay, am not I also the humble James Carlyle's work? I owe him much more than existence, I owe him a noble inspiring example (now that I can read it in that rustic character). It was he exclusively that determined on educating me; that from his small hard-earned funds sent me to school and college, and made me whatever I am or may become. Let me not mourn for my father, let me do worthily of him. So shall he still live even here in me, and his worth plant itself honorably forth into new generations.

It is always right that a man should be able to render a reason for the faith that is within him.

To live each day as though one's last, never flustered, never apathetic, never attitudinizing - here is perfection of character.

Now, as to universal love and mutual aid, they are beneficial and easy beyond a doubt. It seems to me that the only trouble is that there is no superior who encourages it. If there is a superior who encourages it, promoting it with rewards and commendations, threatening its reverse with punishments, I feel people will tend toward universal love and mutual aid like fire tending upward and water downwards - it will be unpreventable in the world.

There are two great fundamental problems common to all thought: (i) the problem of world- and life-affirmation and world- and life-negation, and (2) the problem of ethics and the relations between ethics and these two forms of man's spiritual attitude to Being.

I have always thought the actions of men the best interpreters of their thoughts.

Every soul, the philosopher says, is involuntarily deprived of truth; consequently in the same way it is deprived of justice and temperance and benevolence and everything of the kind. It is most necessary to keep this in mind, for thus thou wilt be more gentle towards all.

The art of writing books is not yet invented. But it is at the point of being invented. Fragments of this nature are literary seeds. There may be many an infertile grain among them: nevertheless, if only some come up!

The Triad has a special beauty and fairness beyond all numbers, primarily because it is the very first to make actual the potentiality of the Monad - oddness, perfection, proportionality, unification, limit.

Christianity is most admirably adapted to the training of slaves, to the perpetuation of a slave society; in short, to the very conditions confronting us to-day.... The rulers of the earth have realized long ago what potent poison inheres in the Christian religion. That is the reason they foster it; that is why they leave nothing undone to instill it into the blood of the people. They know only too well that the subtleness of the Christian teachings is a more powerful protection against rebellion and discontent than the club or the gun.

To wisdom belongs the intellectual apprehension of things eternal; to knowledge, the rational apprehension of things temporal.

It is experience, rather than understanding, that influences behaviour.

You can take away a man's gods, but only to give him others in return.

The ancient Egyptians had a superstitious antipathy to the sea; a superstition nearly of the same kind prevails among the Indians; and the Chinese have never excelled in foreign commerce.

For what is lacking now is not quibbles; nay, the books of the Stoics are full of quibbles.

In every stock-jobbing swindle everyone knows that some time or other the crash must come, but every one hopes that it may fall on the head of his neighbour, after he himself has caught the shower of gold and placed it in safety.

What the public wants is the image of passion, not passion itself.

Because our time is struggling toward the word with which it may express its spirit, many names come to the fore and all make claim to being the right one. Without our assistance, time will not bring the right word to light; we must all work together on it. If, however, so much depends on us, we may reasonably ask what they have made of us and what they propose to make of us; we ask about the education through which they seek to make us creators of that word. Do they conscientiously cultivate our predisposition to become creators or do they treat us only as creatures whose nature simply permits training? Therefore we are concerned above all with what they make of us in the time of our plasticity; the school question is a life question.

Always remember that it is impossible to speak in such a way that you cannot be misunderstood: there will always be some who misunderstand you.

Be wary of passing the judgment: obscure. To find something obscure poses no difficulty: elephants and poodles find many things obscure.

Does the interiorization of media such as letters alter the ratio among our senses and change mental processes?

A life without adventure is likely to be unsatisfying, but a life in which adventure is allowed to take whatever form it will is sure to be short.

One of the principal motifs of Nietzsche's work is that Kant had not carried out a true critique because he was not able to pose the problem of critique in terms of values.

As for the life of money-making, it is one of constraint, and wealth is manifestly not the good of which we are in search, for it is only useful as a means to something else, and for this reason there is less to be said for it than for the ends mentioned before, which are, at any rate, desired for their own sakes.

As to the viciousness of the philosophers, the meaning of this complaint is succinctly expressed in the charge that the philosophers do not "hold the gods the city holds." And this accusation is most true. The quest for wisdom begins in doubt of the conventional wisdom about the highest things. The most cherished beliefs of the community, the collective hopes and fears, are centered on its gods. The unpardonable thing is to be beyond these hopes and fears, beyond the awe and shame the gods impose.

The imitator dooms himself to hopeless mediocrity. The inventor did it because it was natural to him, and so in him it has a charm. In the imitator something else is natural, and he bereaves himself of his own beauty, to come short of another man's.

A critique is not a matter of saying that things are not right as they are. It is a matter of pointing out on what kinds of assumptions, what kinds of familiar, unchallenged, unconsidered modes of thought the practices that we accept rest.

I would take to be quite a fool any man who would make a book full of laws and statutes for an apple tree telling it how to bear apples and not thorns, when the tree is able by its own nature to do this better than the man with all his books can describe and demand.

Anger is a weed; hate is the tree.

We live to improve, or we live in vain.

Reason does not exist for the sake of life, but life for the sake of reason. An existence which does not of itself satisfy reason and solve all her doubts, cannot be the true one.

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

Amongst so many borrowed things, I am glad if I can steal one, disguising and altering it for some new service.

To this man life is already as earnest and awful, and beautiful and terrible, as death.

For anyone who is alone, without God and without a master, the weight of days is dreadful. Hence one must choose a master, God being out of style.

I shall never be ashamed of citing a bad author if the line is good.

Some day you will be old enough to start reading fairy tales again.

Of faith and morals, one cannot speak honestly for long without hurting feelings. Therefore, most people speak dishonestly of the most important subjects. Many recent philosophers prefer not to speak of them at all. But in some situations honesty is incompatible with silence.

You shall find, that there cannot be a greater spur to the attaining what you would have the eldest learn, and know himself, than to set him upon teaching it his younger brothers and sisters.