Quotes from Albert Einstein, who was at least Time Magazines "Man of the Century", and who is perhaps the greatest of all physicists ever:
"I do not believe in a personal God and I have never denied this but have expressed it clearly. If something is in me which can be called religious then it is the unbounded admiration for the structure of the world so far as our science can reveal it."
"A man's ethical behavior should be based effectually on sympathy, education, and social ties and needs; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death."
"I cannot conceive of a God who rewards and punishes his creatures, or has a will of the kind that we experience in ourselves. Neither can I nor would I want to conceive of an individual that survives his physical death; let feeble souls, from fear or absurd egoism, cherish such thoughts."
"The idea of a personal God is an anthropological concept which I am unable to take seriously."
"I do not believe in immortality of the individual, and I consider ethics to be an exclusively human concern with no superhuman authority behind it."
"There is nothing divine about morality; it is a purely human affair."
"The word god is for me nothing more than the expression and product of human weaknesses, the Bible a collection of honourable, but still primitive legends which are nevertheless pretty childish. No interpretation no matter how subtle can (for me) change this."