Do not shorten the morning by getting up late, or waste it in unworthy occupations or in talk; look upon it as the quintessence of life, as to a certain extent sacred. Evening is like old age: we are languid, talkative, silly. Each day is a little life: every waking and rising a little birth, every fresh morning a little youth, every going to rest and sleep a little death.

A robot must protect its own existence as long as such protection does not conflict with the First or Second Laws.

We ought so to behave to one another as to avoid making enemies of our friends, and at the same time to make friends of our enemies. As quoted in Diogenes Laërtius, Lives and Opinions of Eminent Philosophers, "Pythagoras", Sect. 23, as translated in Dictionary of Quotations (1906) by Thomas Benfield Harbottle, p. 320

Science is the knowledge of Consequences, and dependence of one fact upon another: by which, out of that we can presently do, we know how to do something else when we will, or the like, another time.

I am very fond of truth, but not at all of martyrdom.

No matter how busy you may think you are, you must find time for reading, or surrender yourself to self-chosen ignorance.

The more you obey your conscience, the more your conscience will demand of you.

To turn one's eyes away from Jesus means to turn them to the Law.

The reservedness and distance that fathers keep, often deprive their sons of that refuge which would be of more advantage to them than an hundred rebukes or chidings.

We live in the false as long as we have not suffered. But when we begin to suffer, we enter the truth only to regret the false.

Man differs from other animals in one very important respect, and that is that he has some desires which are, so to speak, infinite, which can never be fully gratified, and which would keep him restless even in Paradise. The boa constrictor, when he has had an adequate meal, goes to sleep, and does not wake until he needs another meal. Human beings, for the most part, are not like this.

When I say that children should be told about sex, I do not mean that they should be told only the bare physiological facts; they should be told whatever they wish to know. There should be no attempt to represent adults as more virtuous than they are, or sex as occurring only in marriage. There is no excuse for deceiving children. And when, as must happen in conventional families, they find that their parents have lied, they lose confidence in them, and feel justified in lying to them.

Man is a creation of desire, not a creation of need.

The sensate body possesses an art of interrogating the sensible according to its own wishes, an inspired exegesis The Visible and the Invisible, trans.

People will tell us that without the consolations of religion they would be intolerably unhappy. So far as this is true, it is a coward's argument. Nobody but a coward would consciously choose to live in a fool's paradise. When a man suspects his wife of infidelity, he is not thought the better of for shutting his eyes to the evidence. And I cannot see why ignoring evidence should be contemptible in one case and admirable in the other.

I believe in the salvation of humanity, in the future of cyanide . . .

The man of virtue makes the difficulty to be overcome his first business, and success only a subsequent consideration: this may be called perfect virtue.

This practically amounts to saying that much that it is legitimate to admire in this field need nevertheless not be imitated, and that religious phenomena, like all other human phenomena, are subject to the law of the golden mean. Political reformers accomplish their successive tasks in the history of nations by being blind for the time to other causes. Great schools of art work out the effects which it is their mission to reveal, at the cost of a one-sidedness for which other schools must make amends. We accept a John Howard, a Mazzini, a Botticelli, a Michael Angelo, with a kind of indulgence. We are glad they existed to show us that way, but we are glad there are also other ways of seeing and taking life. So of many of the saints we have looked at. We are proud of a human nature that could be so passionately extreme, but we shrink from advising others to follow the example.

The film concludes with ... the most nauseatingly luscious, the most penetratingly vulgar mammy song that it has ever been my lot to hear. My flesh crept as the loud speaker poured out those sodden words, the greasy, sagging melody. I felt ashamed of myself for listening to such things, for even being a member of the species to which such things are addressed.

Green capitalism won't save us. Electric cars, solar panels, sustainable products - all maintain consumption while appearing eco-friendly. Real environmental change requires less production, not greener production. Green capitalism is rebranding, not revolution.

Try now to answer my third riddle. By what rule to you tell a copy from an original?'

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.

An event has happened, upon which it is difficult to speak, and impossible to be silent.

...what the freedom is that I love, and that to which I think all men intitled. It is not solitary, unconnected, individual, selfish Liberty. As if every Man was to regulate the whole of his Conduct by his own will. The Liberty I mean is social freedom. It is that state of things in which Liberty is secured by the equality of Restraint; A Constitution of things in which the liberty of no one Man, and no body of Men and no Number of men, can find Means to trespass on the liberty of any Person, or any description of Persons in the Society. This kind of liberty is indeed but another name for Justice, as ascertained by wise Laws, and secured by well-constructed institutions.

My father was as well aware as anyone that Christians do not, in general, undergo the demoralizing consequences which seem inherent in such a creed, in the manner or to the extent which might have been expected from it. The same slovenliness of thought, and subjection of the reason to fears, wishes, and affections, which enable them to accept a theory involving a contradiction in terms, prevents them from perceiving the logical consequences of the theory. Such is the facility with which mankind believe at one and the same time things inconsistent with one another, and so few are those who draw from what they receive as truths, any consequences but those recommended to them by their feelings, that multitudes have held the undoubting belief in an Omnipotent Author of Hell, and have nevertheless identified that being with the best conception they were able to form of perfect goodness.

One grasps incomparably more things in boredom than by labor, effort being the mortal enemy of meditation.

What the English call "comfortable" is something endless and inexhaustible. Every condition of comfort reveals in turn its discomfort, and these discoveries go on for ever. Hence the new want is not so much a want of those who have it directly, but is created by those who hope to make profit from it.

What do I care about Jupiter? Justice is a human issue, and I do not need a god to teach it to me.

A man must be perfectly crazy who, where there is tolerable security, does not employ all the stock which he commands…

Ye do err, not knowing the scriptures, nor the power of God. For in the resurrection they neither marry, nor are given in marriage, but are as the angels of God in heaven. But as touching the resurrection of the dead, have ye not read that which was spoken unto you by God, saying, I am the God of Abraham, and the God of Isaac, and the God of Jacob? God is not the God of the dead, but of the living.

Oh providence! Oh nature! Treasure of the poor, resource of the unfortunate. The person who feels, knows your holy laws and trusts them, the person whose heart is at peace and whose body does not suffer, thanks to you is not entirely prey to adversity.

The sentiments of men often differ with regard to beauty and deformity of all kinds, even while their general discourse is the same ... In all matters of opinion and science, the case is opposite: The difference among men is there oftener found to lie in generals than in particulars; and to be less in reality than in appearance.

When we know what words are worth, the amazing thing is that we try to say anything at all, and that we manage to do so. This requires, it is true, a supernatural nerve.

The universe is composed of matter, and, as a system, is sustained by motion. Motion is not a property of matter, and without this motion the solar system could not exist. Were motion a property of matter, that undiscovered and undiscoverable thing, called perpetual motion, would establish itself. It is because motion is not a property of matter, that perpetual motion is an impossibility in the hand of every being, but that of the Creator of motion. When the pretenders to Atheism can produce perpetual motion, and not till then, they may expect to be credited.

What, then, is the animal? First of all, a system of plant-souls. The unity of those plant-souls, which unity nature itself produces, is the soul of the animal. Its world is therefore partly that of the plants - its nourishment, for instance, it receives partly through synthesis from vegetable, and through analysis from animal nature - and partly that of the animals, whereof we shall speak directly. Each product of nature is an organically in-itself completed totality in space, like the plant. Hence, the unknown x which we are looking for must also be such a whole or totality, and in so far it must also have a principle of organization, a sphere and central point of this organization ; in short, the same which we have called the soul of the plant, which thus remains common to both. ... The animal is a system of plant-souls, and the plant is a separated, isolated part of an animal. Both reciprocally affect each other.

The concrete man has but one interest - to be right. That to him is the art of all arts, and all means are fair which help him to it.

"Instead of defining the word, let us briefly characterize or describe the phenomenon. Ressentiment is a self-poisoning of the mind which has quite definite causes and consequences. It is a lasting mental attitude, caused by the systematic repression of certain emotions and affects which, as such, are normal components of human nature. Their repression leads to the constant tendency to indulge in certain kinds of value delusions and corresponding value judgments. The emotions and affects primarily concerned are revenge, hatred, malice, envy, the impulse to detract, and spite.

It appears then, that capitalist production comprises conditions independent of good or bad will, conditions which permit the working-class to enjoy that relative prosperity only momentarily, and at that always only as the harbinger of a coming crisis.

To love at all is to be vulnerable. Love anything, and your heart will certainly be wrung and possibly be broken. If you want to make sure of keeping it intact, you must give your heart to no one, not even to an animal. Wrap it carefully round with hobbies and little luxuries; avoid all entanglements; lock it up safe in the casket or coffin of your selfishness. But in that casket - safe, dark, motionless, airless - it will change. It will not be broken; it will become unbreakable, impenetrable, irredeemable. The alternative to tragedy, or at least to the risk of tragedy, is damnation. The only place outside of Heaven where you can be perfectly safe from all the dangers and perturbations of love is Hell.

The revolution must end and the republic must begin. In our constitution, right must take the place of duty, welfare that of virtue, and self-defense that of punishment. Everyone must be able to prevail and to live according to one's own nature.

I have been merely oppressed by the weariness and tedium and vanity of things lately: nothing stirs me, nothing seems worth doing or worth having done: the only thing that I strongly feel worth while would be to murder as many people as possible so as to diminish the amount of consciousness in the world. These times have to be lived through: there is nothing to be done with them.

Our moral virtues benefit mainly other people; intellectual virtues, on the other hand, benefit primarily ourselves; therefore the former make us universally popular, the latter unpopular.

Without consciousness the mind-body problem would be much less interesting. With consciousness it seems hopeless.

First Shakespeare sonnets seem meaningless; first Bach fugues, a bore; first differential equations, sheer torture. But training changes the nature of our spiritual experiences. In due course, contact with an obscurely beautiful poem, an elaborate piece of counterpoint or of mathematical reasoning, causes us to feel direct intuitions of beauty and significance. It is the same in the moral world.

It pertains to all men to know themselves and to learn self-control.

An entire mythology is stored within our language.

Science does not know its debt to imagination.

A grievous crime indeed against religion has been committed by the man who imagines that Islam is defended by the denial of the mathematical sciences.

There is no worse lie than a truth misunderstood by those who hear it.

Obstinacy in a bad cause, is but constancy in a good.