Ethics, too, are nothing but reverence for life. This is what gives me the fundamental principle of morality, namely, that good consists in maintaining, promoting, and enhancing life, and that destroying, injuring, and limiting life are evil.

The great fault of all ethics hitherto has been that they believed themselves to have to deal only with the relations of man to man. In reality, however, the question is what is his attitude to the world and all life that comes within his reach. A man is ethical only when life, as such, is sacred to him, and that of plants and animals as that of his fellow men, and when he devotes himself helpfully to all life that is in need of help. Only the universal ethic of the feeling of responsibility in an ever-widening sphere for all that lives — only that ethic can be founded in thought. … The ethic of Reverence for Life, therefore, comprehends within itself everything that can be described as love, devotion, and sympathy whether in suffering, joy, or effort.

The fundamental principle of morality which we seek as a necessity for thought is not, however, a matter only of arranging and deepening current views of good and evil, but also of expanding and extending these. A man is really ethical only when he obeys the constraint laid on him to help all life which he is able to succour, and when he goes out of his way to avoid injuring anything living. He does not ask how far this or that life deserves sympathy as valuable in itself, nor how far it is capable of feeling. To him life as such is sacred. He shatters no ice crystal that sparkles in the sun, tears no leaf from its tree, breaks off no flower, and is careful not to crush any insect as he walks. If he works by lamplight on a summer evening, he prefers to keep the window shut and to breathe stifling air, rather than to see insect after insect fall on his table with singed and sinking wings.

Let me give you a definition of ethics: It is good to maintain and further life — it is bad to damage and destroy life. And this ethic, profound and universal, has the significance of a religion. It is religion.

there is a basic ethical attitude: respect for life, respect for other humans, certainly, but for all forms of life. It’s something that if everyone could just realize how special it is to be alive on this little blue speck in the universe, it’s a miracle that life exists at all and that we have a piece of time that is ours — whoever we are, shorter or longer, whatever it is, but — to really be a part of the action and to respect where we have come from, where we might be going.

The ethic of reverence for life constrains all, in whatever walk of life they may find themselves, to busy themselves intimately with all the human and vital processes which are being played out around them, and to give themselves as men to the man who needs human help and sympathy. It does not allow the scholar to live for his science alone, even if he is very useful to the community in so doing. It does not permit the artist to exist only for his art, even if he gives inspiration to many by its means. It refuses to let the business man imagine that he fulfills all legitimate demands in the course of his business activities. It demands from all that they should sacrifice a portion of their own lives for others. In what way and in what measure this is his duty, this everyone must decide on the basis of the thoughts which arise in himself, and the circumstances which attend the course of his own life. The self-sacrifice of one may not be particularly in evidence. He carries it out simply by continuing his normal life. Another is called to some striking self-surrender which obliges him to set on one side all regard for his own progress. Let no one measure himself by his conclusions respecting someone else. The destiny of men has to fulfill itself in a thousand ways, so that goodness may be actualized. What every individual has to contribute remains his own secret. But we must all mutually share in the knowledge that our existence only attains its true value when we have experienced in ourselves the truth of the declaration: 'He who loses his life shall find it.'

The defect in this argument is that it assumes that the basis of ethics is life, whereas ethics is concerned, not with life, but with consciousness. The question ever asked by ethics is not, Does the thing live? but. Does it feel? It is impossible to do right and wrong to that which is incapable of sentient experience. Ethics arises with consciousness and is coextensive with it. We have no ethical relation to the clod, the molecule, or the scale sloughed off from our skin on the back of our hand, because the clod, the molecule, and the scale have no feeling, no soul, no anything rendering them capable of being affected by us. And the same thing is true of the cabbage, and the onion, and of plants generally. The fact that a thing is an organism, that it has organisation, has in itself no more ethical significance than the fact that it has symmetry, or redness, or weight.

I must interpret the life about me as I interpret the life that is my own. My life is full of meaning to me. The life around me must be full of significance to itself. If I am to expect others to respect my life, then I must respect the other life I see, however strange it may be to mine. And not only other human life, but all kinds of life: life above mine, if there be such life; life below mine, as I know it to exist. Ethics in our Western world has hitherto been largely limited to the relations of man to man. But that is a limited ethics. We need a boundless ethics which will include the animals also.

Ethics is the most vital and important of all sciences. It has both its theoretical and applied aspects. Its mission is nothing less than the establishment of harmony among the inhabitants of the earth and the transformation of world-wide contention into peace and happiness.

Ethic is the core of humanity and the foundation of civilization.

Ethics occupies a central place in philosophy because it is concerned with sin, with the origin of good and evil and with moral valuations. And since these problems have a universal significance, the sphere of ethics is wider than is generally supposed. It deals with meaning and value and its province is the world in which the distinction between good and evil is drawn, evaluations are made and meaning is sought.

Ethics is in origin the art of recommending to others the sacrifices required for co-operation with oneself.

The ethics of reverence for life makes no distinction between higher and lower, more precious and less precious lives. It has good reasons for this omission. For what are we doing, when we establish hard and fast gradations in value between living organisms, but judging them in relation to ourselves, by whether they seem to stand closer to us or farther from us. This is a wholly subjective standard. How can we know what importance other living organisms have in themselves and in terms of the universe?

A man is ethical only when life, as such, is sacred to him, that of plants and animals as that of his fellow men, and when he devotes himself helpfully to all life that is in need of help.