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. -Albert Schweitzer.

Let me give you a definition of ethics: It is good to maintain and further life it is bad to damage and destroy life.

I can do no other than be reverent before everything that is called life. I can do no other than to have compassion for all that is called life. That is the beginning and the foundation of all ethics.

Think occasionally of the suffering of which you spare yourself the sight.

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.Civilization and Ethics, 1949

The human spirit is not dead. It lives on in secret... It has come to believed that compassion, in which all ethics must take root, can only attain its full breadth and depth if it embraces all living creatures and does not limit itself to mankind.-