“The highest result of education is tolerance… Long-ago men fought and died for their faith; but it took ages to teach them the other kind of courage – the courage to recognize the faiths of their brethren and their rights of conscience. Tolerance is the first principle of community… No loss by flood and lightning, no destruction of cities and temples by the hostile forces of nature, has deprived man of so many noble lives and impulses as those which his intolerance has destroyed.”

— Helen Keller, Optimism (1903), p. 44