We share this planet, our home, with millions of species. Justice and sustainability both demand that we do not use more resources than we need. Restraint in resource use and living within nature's limits are preconditions for social justice. The commons are where justice and sustainability converge, where ecology and equity meet. The survival of pastures and forests as community property, or of a common good like a stable ecosystem, is only possible with social organizations with checks and controls on the use of resources built into their principles. The breakdown of a community, with the associated erosion of concepts of joint ownership and responsibility, can trigger the degradation of common resources.

When a book and a head collide and a hollow sound is heard, must it always have come from the book?

The closed language does not demonstrate and explain-it communicates decision, dictum, command. Where it defines, the definition becomes "separation of good from evil;" it establishes unquestionable.

I urge you to please notice when you are happy, and exclaim or murmur or think at some point, "If this isn't nice, I don't know what is."

Absurdity destroys the and of the enumeration by making impossible the in where the things enumerated would be divided up.

It cannot be doubted, I think, that Mr. Darwin has satisfactorily proved that what he terms selection, or selective modification, must occur, and does occur, in nature; and he has also proved to superfluity that such selection is competent to produce forms as distinct, structurally, as some genera even are. If the animated world presented us with none but structural differences, I should have no hesitation in saying that Mr. Darwin has demonstrated the existence of a true physical cause, amply competent to account for the origin of living species, and of man among the rest.

Bad laws are the worst sort of tyranny.

Kindly remember that he whom you call your slave sprang from the same stock, is smiled upon by the same skies, and on equal terms with yourself breathes, lives and dies. It is just as possible for you to see in him a free-born man as for him to see in you a slave.

Don't get involved in partial problems, but always take flight to where there is a free view over the whole single great problem.

What is an artist? A provincial who finds himself somewhere between a physical reality and a metaphysical one... It's this in-between that I'm calling a province, this frontier country between the tangible world and the intangible one - which is really the realm of the artist.

If an action ... involves little profit but much righteousness, do it.

Reason ... contradicts the established order of men and things on behalf of existing societal forces that reveal the irrational character of this order - for "rational" is a mode of thought and action which is geared to reduce ignorance, destruction, brutality, and oppression.

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

I say a murder is abstract. You pull the trigger and after that you do not understand anything that happens.

Until writing was invented, man lived in acoustic space: boundless, directionless, horizonless, in the dark of the mind, in the world of emotion, by primordial intuition, terror. Speech is a social chart of this bog.

The more we learn about the world, and the deeper our learning, the more conscious, specific, and articulate will be our knowledge of what we do not know, our knowledge of our ignorance. For this, indeed, is the main source of our ignorance - the fact that our knowledge can be only finite, while our ignorance must necessarily be infinite. Variant translation: The more we learn about the world, and the deeper our learning, the more conscious, clear, and well-defined will be our knowledge of what we do not know, our knowledge of our ignorance. The main source of our ignorance lies in the fact that our knowledge can only be finite, while our ignorance must necessarily be infinite.

The true wisdom is to be always seasonable, and to change with a good grace in changing circumstances. To love playthings well as a child, to lead an adventurous and honourable youth, and to settle when the time arrives, into a green and smiling age, is to be a good artist in life and deserve well of yourself and your neighbour.

I have no need to take up each thing that wants to throw its cause on us and show that it is occupied only with itself, not with us, only with its good, not with ours. Look at the rest for yourselves. Do truth, freedom, humanity, justice, desire anything else than that you grow enthusiastic and serve them?

It is a rough road that leads to the heights of greatness.

We should desire neither the immortality nor the death of any human being, whoever he may be, with whom we have to do.

Advocates of capitalism are very apt to appeal to the sacred principles of liberty, which are embodied in one maxim: The fortunate must not be restrained in the exercise of tyranny over the unfortunate.

The process of philosophizing, to my mind, consists mainly in passing from those obvious, vague, ambiguous things, that we feel quite sure of, to something precise, clear, definite, which by reflection and analysis we find is involved in the vague thing that we start from, and is, so to speak, the real truth of which that vague thing is a sort of shadow.

To such a one, already filled with intellectual substance, and possessing what we may call the practical gold-bullion of human culture, it was an obvious improvement that he should be taught to speak it out of him on occasion; that he should carry a spiritual banknote producible on demand for what of "gold-bullion" he had, not so negotiable otherwise, stored in the cellars of his mind. A man, with wisdom, insight and heroic worth already acquired for him, naturally demanded of the schoolmaster this one new faculty, the faculty of uttering in fit words what he had. A valuable superaddition of faculty:-and yet we are to remember it was scarcely a new faculty; it was but the tangible sign of what other faculties the man had in the silent state.

Dualism makes the problem insoluble; materialism denies the existence of any phenomenon to study, and hence of any problem.

All journeys have secret destinations of which the traveler is unaware.

Yes, I am in favor of censorship, but it has to be conducted by people like me. And that's the difficulty (laughs). I'm in favor of encouraging every possible form of self-restraint and parental control. And I certainly don't think that pornography should be protected under the American Constitution.

I am looking forward very much to getting back to Cambridge, and being able to say what I think and not to mean what I say: two things which at home are impossible. Cambridge is one of the few places where one can talk unlimited nonsense and generalities without anyone pulling one up or confronting one with them when one says just the opposite the next day.

There were gentlemen and there were seamen in the navy of Charles II. But the seamen were not gentlemen, and the gentlemen were not seamen.

How just, how suitable to our crime is the punishment with which Providence threatens us? We have enslaved multitudes, and shed much innocent blood in doing it; and now are threatened with the same. And while other evils are confessed, and bewailed, why not this especially, and publicly; than which no other vice, if all others, has brought so much guilt on the land?

From these two immediate perceptions, we gain a mediate, or inferential perception of the relation of all four instants. This mediate perception is objectively, or as to the object being represented, spread over the four instants; but subjectively, or as itself the subject of duration, it is completely embraced in the second moment. (The reader will observe that I use the word instant to mean a point in time, and moment to mean an infinitesimal duration.

For this is our central human problem: that we are almost constantly the victims of our emotions, always being swept up and down on a kind of inner-switchback. We possess a certain control over them; we can 'direct our thoughts' -- or feelings -- in such a way as to intensify them. This is certainly our most remarkable human characteristic: imagination. Animals require actual physical stimuli to trigger their experience. A man can retreat into a book -- or a daydream -- and live through certain experiences quite independent of the physical world. He can even, for example, imagine a sexual encounter, and not only experience all the appropriate physical responses, but even the sexual climax. Such a curious ability is far beyond the power of any animal.

The Hero as Divinity, the Hero as Prophet, are productions of old ages; not to be repeated in the new. They presuppose a certain rudeness of conception, which the progress of mere scientific knowledge puts an end to. There needs to be, as it were, a world vacant, or almost vacant of scientific forms, if men in their loving wonder are to fancy their fellow-man either a god or one speaking with the voice of a god. Divinity and Prophet are past.

History proves nothing because it contains everything.

Conformity to nature has no connection whatever with right and wrong. The idea can never be fitly introduced into ethical discussions at all, except, occasionally and partially, into the question of degrees of culpability. To illustrate this point, let us consider the phrase by which the greatest intensity of condemnatory feeling is conveyed in connection with the idea of nature - the word "unnatural." That a thing is unnatural, in any precise meaning which can be attached to the word, is no argument for its being blamable; since the most criminal actions are to a being like man not more unnatural than most of the virtues.

In the meanest mortal there lies something nobler. The poor swearing soldier, hired to be shot, has his "honor of a soldier," different from drill-regulations and the shilling a day. It is not to taste sweet things, but to do noble and true things, and vindicate himself under God's Heaven as a god-made Man, that the poorest son of Adam dimly longs. Show him the way of doing that, the dullest day-drudge kindles into a hero. They wrong man greatly who say he is to be seduced by ease.

Whenever you say anything good about East Germany, immediately somebody jumps up and says, "My God, you're a Stalinist..." I'm not defending everything about it, of course. But I laboured on the chapter that talks about the east. I fact-checked it; I had somebody else fact-check it. I knew that I was going to get a lot of flak for that. But in the beginning, East Germany did a better job. They just did.

The appreciation of the merits of art (of the emotions it conveys) depends upon an understanding of the meaning of life, what is seen as good and evil. Good and evil are defined by religions.

Whatever it may be, animals have always had, until our era, a divine or sacrificial nobility that all mythologies recount. Even murder by hunting is still a symbolic relation, as opposed to an experimental dissection. Even domestication is still a symbolic relation, as opposed to industrial breeding. One only has to look at the status of animals in peasant society. And the status of domestication, which presupposes land, a clan, a system of parentage of which the animals are a part, must not be confused with the status of the domestic pet-the only type of animals that are left to us outside reserves and breeding stations-dogs, cats, birds, hamsters, all packed together in the affection of their master. The trajectory animals have followed, from divine sacrifice to dog cemeteries with atmospheric music, from sacred defiance to ecological sentimentality, speaks loudly enough of the vulgarization of the status of man himself.

I shall, without further discussion of the other theories, attempt to contribute something towards the understanding and appreciation of the Utilitarian or Happiness theory, and towards such proof as it is susceptible of. It is evident that this cannot be proof in the ordinary and popular meaning of the term. Questions of ultimate ends are not amenable to direct proof. Whatever can be proved to be good, must be so by being shown to be a means to something admitted to be good without proof.

This avidity alone, of acquiring goods and possessions for ourselves and our nearest friends, is insatiable, perpetual, universal, and directly destructive of society.

I am as firmly convinced that religions do harm as I am that they are untrue.

The fellow who eggs you on to avenge yourself will rob you of what you were going to say, as we forgive our debtors. When you have forfeited that, all your sins will be held against you; absolutely nothing is forgiven.

Thus poetry, regarded as a vehicle of thought, is especially impressive partly because it obeys all the laws of effective speech, and partly because in so doing it imitates the natural utterances of excitement.

Everyone knows that time is Death, that Death hides in clocks. Imposing another time powered by the Clock of the Imagination, however, can refuse his law. Here, freed of the Grim Reaper's scythe, we learn that pain is knowledge and all knowledge pain.

The mathematical thermology created by Fourier may tempt us to hope that, as he has estimated the temperature of the space in which we move, me may in time ascertain the mean temperature of the heavenly bodies: but I regard this order of facts as for ever excluded from our recognition. We can never learn their internal constitution, nor, in regard to some of them, how heat is absorbed by their atmosphere. We may therefore define Astronomy as the science by which we discover the laws of the geometrical and mechanical phenomena presented by the heavenly bodies.

Everyday we act in ways that reflect our ethical judgements.

I had wished to visit a slaughter-house, in order to see with my own eyes the reality of the question raised when vegetarianism is discussed. But at first I felt ashamed to do so, as one is always ashamed of going to look at suffering which one knows is about to take place, but which one cannot avert; and so I kept putting off my visit. But a little while ago I met on the road a butcher ... He is not yet an experienced butcher, and his duty is to stab with a knife. I asked him whether he did not feel sorry for the animals that he killed. He gave me the usual answer: 'Why should I feel sorry? It is necessary.' But when I told him that eating flesh is not necessary, but is only a luxury, he agreed; and then he admitted that he was sorry for the animals.