Science is the attempt to make the chaotic diversity of our sense-experience correspond to a logically uniform system of thought.

The ideals which have lighted my way, and time after time have given me new courage to face life cheerfully, have been Kindness, Beauty, and Truth. Without the sense of kinship with men of like mind, without the occupation with the objective world, the eternally unattainable in the field of art and scientific endeavors, life would have seemed to the empty. The trite objects of human efforts — possessions, outward success, luxury—have always seemed to me contemptible.

I never thought that others would take my theories so much more seriously than I did.

The Universe is difficult to comprehend because it is obvious.

I advocate world government because I am convinced that there is no other possible way of eliminating the most terrible danger in which man has ever found himself. The objective of avoiding total destruction must have priority over any other objective.

Science is a wonderful thing if one does not have to earn one's living at it.

[I] must seek in the stars that which was denied [to me] on earth.