What we really are matters more than what other people think of us.

Time is not measured by the passing of years but by what one does, what one feels, and what one achieves.

Act with courage and dignity; stick to the ideals that give meaning to life.

It is science alone that can solve the problems of hunger and poverty, of insanitation and illiteracy, of superstition and deadening custom and tradition, of vast resources running to waste, or a rich country inhabited by starving people... Who indeed could afford to ignore science today? At every turn we have to seek its aid... The future belongs to science and those who make friends with science.

Its [Communism's] unfortunate association with violence encourages a certain evil tendency in human beings.

Without peace, all other dreams vanish and are reduced to ashes.

I want nothing to do with any religion concerned with keeping the masses satisfied to live in hunger, filth, and ignorance.