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

Our Constitution, by its separation of powers and its system of checks and balances, acts as a restraint upon efficiency by denying exclusive power to any branch of government. The logic of governmental efficiency, unchecked, runs straight on, not only to dictatorship, but also to torture, assassination, and other abominations.

All religions are cruel, all founded on blood; for all rest principally on the idea of sacrifice - that is, on the perpetual immolation of humanity to the insatiable vengeance of divinity.

If historical experience could teach us anything, it would be that private property is inextricably linked with civilization.

When my ability to reason shows me that the suffering of another being is very similar to my own suffering and matters just as much to that other being as my own suffering matters to me, then my reason is showing me something that is undeniably true. ... The perspective on ourselves that we get when we take the point of view of the universe also yields as much objectivity as we need if we are to find a cause that is worthwhile in a way that is independent of our own desires. The most obvious such cause is the reduction of pain and suffering, wherever it is to be found.

All-powerful god, who am I but the fear that I inspire in others?

All laws are... deduced from experiment; but to enunciate them, a special language is needful... ordinary language is too poor...This... is one reason why the physicist can not do without mathematics; it furnishes him the only language he can speak. And a well-made language is no indifferent thing;...the analyst, who pursues a purely esthetic aim, helps create, just by that, a language more fit to satisfy the physicist....law springs from experiment, but not immediately. Experiment is individual, the law deduced from it is general; experiment is only approximate, the law is precise...In a word, to get the law from experiment, it is necessary to generalize... But how generalize? ...in this choice what shall guide us?It can only be analogy. ...What has taught us to know the true profound analogies, those the eyes do not see but reason divines?It is the mathematical spirit, which disdains matter to cling only to pure form.

A criminal who, having renounced reason ... hath, by the unjust violence and slaughter he hath committed upon one, declared war against all mankind, and therefore may be destroyed as a lion or tyger, one of those wild savage beasts with whom men can have no society nor security. And upon this is grounded the great law of Nature, "Whoso sheddeth man's blood, by man shall his blood be shed."

How selfish soever man may be supposed, there are evidently some principles in his nature, which interest him in the fortune of others, and render their happiness necessary to him, though he derives nothing from it except the pleasure of seeing it.

To all Christian governments Christianity was not a rule of means but a means of rule; Christ was for the people, Machiavelli was preferred by the kings. The state in some measure had civilized man, but who would civilize the state?

To be sure, risks abound; but no one is proposing compassionate stewardship of ecosystems by philosophers. Humans are capable of choosing our own future pain-sensitivity too; but any species-wide genomic shift in human pain tolerance will depend on the willingness of prospective parents to use preimplantation genetic screening.

It is so characteristic, that just when the mechanics of reproduction are so vastly improved, there are fewer and fewer people who know how the music should be played.

Man is a credulous animal, and must believe something; in the absence of good grounds for belief, he will be satisfied with bad ones.

Why callest thou me good? there is none good but one, that is, God: but if thou wilt enter into life, keep the commandments.

By the air which I breathe, and by the water which I drink, I will not endure to be blamed on account of this discourse.

What are you waiting for in order to give up?

Having departed from your house, turn not back; for the furies will be your attendants.

There are three juridical attributes that inseparably belong to the citizen by right. These are: Constitutional freedom, as the right of every citizen to have to obey no other law than that to which he has given his consent or approval; Civil equality, as the right of the citizen to recognize no one as a superior among the people in relation to himself...; and Political independence, as the right to owe his existence and continuance in society not to the arbitrary will of another, but to his own rights and powers as a member of the commonwealth.

My idea of heaven is, eating pâté de foie gras to the sound of trumpets.

...Zen Buddhism, this religion of immanence.

We haven't accepted - we can't really believe - that the most characteristic product of our age of scientific miracles is junk, but that is so. And we still think and behave as though we face an unspoiled continent, with thousands of acres of living space for every man. We still sing "America the Beautiful" as though we had not created in it, by strenuous effort, at great expense, and with dauntless self-praise, an unprecedented ugliness.

All violence consists in some people forcing others, under threat of suffering or death, to do what they do not want to do.

The invasion... exhibits in stark terms, the choice that is before us today between maintaining a liberal government that respects the rights of individuals, or moving over to a form of centralized illiberal dictatorship, even if that... illiberal government is somehow democratically legitimated. ...That's the central issue in global politics today. ...That's basically what the... Ukraine invasion is about, and that's why... all liberal societies that care about those individual freedoms... have a very powerful interest in the outcome of that war, because Putin and Russia are at the center of an international network of illiberal forces that are seeking to overturn liberal values in virtually every part of the world, and therefore... that's all part of a larger global struggle over our fundamental liberal values.

In my opinion, all things in nature occur mathematically.

What can be said, lacks reality. Only what fails to make its way into words exists and counts.

One of the things that happens at the speed of light is that people lose their goals in life. So what takes the place of goals and objectives? Well, role-playing is coming in very fast.

On the more conservative side... Liberalism has been associated with... the right to own private property... one of the most fundamental individual rights that is protected in true liberal societies, and that right is... what made possible the modern economic world. As any economist would tell you, without secure property rights and contract enforcement, you don't get investment and therefore economic growth.

Political questions are far too serious to be left to the politicians.

Whoever heard me assert that the grey cat playing just now in the yard is the same one that did jumps and tricks there five hundred years ago will think whatever he likes of me, but it is a stranger form of madness to imagine that the present-day cat is fundamentally an entirely different one.

Thanks to depression - that alpinism of the indolent - we scale every summit and daydream over every precipice from our bed.

Just as Marx used to say about the French Marxists of the late 'seventies: All I know is that I am not a Marxist.

I opened with that which good Catholics have more than once made to Huguenots. "My dear sir," said I, "were you ever baptized?" "No, friend," replied the Quaker, "nor any of my brethren." "Zounds!" said I to him, "you are not Christians then!" "Friend," replied the old man, in a soft tone of voice, "do not swear; we are Christians, but we do not think that sprinkling a few drops of water on a child's head makes him a Christian." "My God!" exclaimed I, shocked at his impiety, "have you then forgotten that Christ was baptized by St. John?" "Friend," replied the mild Quaker, "once again, do not swear. Christ was baptized by John, but He Himself never baptized any one; now we profess ourselves disciples of Christ, and not of John." "Mercy on us," cried I, "what a fine subject you would be for the holy inquisitor! In the name of God, my good old man, let me baptize you."

A state without the means of some change is without the means of its conservation.

If I solve my dispute with my neighbor by killing him, I have certainly solved the immediate dispute. If my neighbor was a scoundrel, then the world is no doubt better for his absence. But in killing my neighbor, though he may have been a terrible man who did not deserve to live, I have made myself a killer - and the life of my next neighbor is in greater peril than the life of the last. In making myself a killer I have destroyed the possibility of neighborhood.

There has been a general trend in recent times toward a Unitarian mythology and the worship of one God. This is the tendency which it is customary to regard as spiritual progress. On what grounds? Chiefly, so far as one can see, because we in the Twentieth Century West are officially the worshippers of a single divinity. A movement whose consummation is Us must be progressive. Quod erat demonstrandum.

We should, out of decency, choose for ourselves the moment to disappear.

But oppression by your Mock-Superiors well shaken off, the grand problem yet remains to solve: That of finding government by your Real-Superiors! Alas, how shall we ever learn the solution of that, benighted, bewildered, sniffing, sneering, godforgetting unfortunates as we are? It is a work for centuries; to be taught us by tribulations, confusions, insurrections, obstructions; who knows if not by conflagration and despair! It is a lesson inclusive of all other lessons; the hardest of all lessons to learn.

Always put the best interpretation on a tenet. Why not on Christianity, wholesome, sweet, and poetic? It is the record of a pure and holy soul, humble, absolutely disinterested, a trutn-speaker, and bent on serving, teaching, and uplifting men. Christianity taught the capacity, the element, to Jove the All-perfect without a stingy bargain for personal happiness. It taught that to love him was happiness,-to love him in other's virtues.

The noblest Digladiation is in the Theatre of ourselves.

Look upon yourself as more powerful than they give you out for, and you have more power; look upon yourself as more, and you have more.

I have lived an honest and useful life to mankind; my time has been spend in doing good and I die in perfect composure and resignation to the will of my Creator, God.

Each visitor performed the ceremony of greeting this old aunt whom not one of them knew, not one of them wanted to know, and not one of them cared about; Anna Pávlovna observed these greetings with mournful and solemn interest and silent approval. The aunt spoke to each of them in the same words, about their health and her own, and the health of Her Majesty, "who, thank God, was better today." And each visitor, though politeness prevented his showing impatience, left the old woman with a sense of relief at having performed a vexatious duty and did not return to her the whole evening.

All pain is a punishment, and every punishment is inflicted for love as much as for justice.

Neither of us cares a straw for popularity. A proof of this is for example, that, because of aversion to any personality cult, I have never permitted the numerous expressions of appreciation from various countries with which I was pestered during the existence of the International to reach the realm of publicity, and have never answered them, except occasionally by a rebuke. When Engels and I first joined the secret Communist Society we made it a condition that everything tending to encourage superstitious belief in authority was to be removed from the statutes.

Reason has never really directed social reality, but now reason has been so thoroughly purged of any specific trend or preference that it has finally renounced even the task of passing judgment on man's actions and way of life. Reason has turned them over for ultimate sanction to the conflicting interests to which our world actually seems abandoned.

Yet there is a certain solitude like no other - that of the man preparing his meal in public on a wall, or on the hood of his car, or along a fence, alone. You see that all the time here. It is the saddest sight in the world. Sadder than destitution, sadder than the beggar is the man who eats alone in public. Nothing more contradicts the laws of man or beast, for animals always do each other the honour of sharing or disputing each other's food. He who eats alone is dead (but not he who drinks alone. Why is this?).