“A man's ethical behavior should be based effectually on sympathy, education, and social ties and needs; no religious basis is necessary. Man would be in a poor way if he had to be restrained by fear of punishment and hopes of reward after death.”

German physicist, early 20th century. His theory of relativity reshaped modern science, offering groundbreaking explanations of space, time, and gravity. Beyond physics, his accessible writings and public advocacy championed reason, curiosity, and the ethical use of knowledge.