Until he extends the circle of his compassion to all living things, man will not himself find peace.
Attributed
insightcompassionnaturepeaceThis is a genuine expression of Schweitzer's Reverence for Life (Ehrfurcht vor dem Leben) ethic and is attributed to him consistently in the ethics and animal-welfare literature, unlike the motivational lines attached to his name. I recall it in connection with The Philosophy of Civilization / Civilization and Ethics (1923) but cannot confirm the volume or the German original, so the citation is left null. Author attribution strong; exact source unverified.