To the truly ethical man, all of life is sacred, including forms of life that from the human point of view may seem lower than ours.

Affirmation of the world, which means affirmation of the will-to-live that manifests itself around me, is only possible if I devote myself to other life.

The quiet conscience is an invention of the devil.

Help me to fling my life like a flaming firebrand into the gathering darkness of the world.

Within every patient there resides a doctor, and we as physicians are at our best when we we put our patients in touch with the doctor inside themselves.

The last fact which knowledge can discover is that the world is a manifestation, and in every way a puzzling manifestation, of the universal will to live.

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.