The world today is made, it is powered by science; and for any man to abdicate an interest in science is to walk with open eyes towards slavery.

The preoccupation with the choice of a mate both by male and female I regard as a continuing echo of the major selective force by which we have evolved.

It is very much easier to divide your outlook on the world into two halves, to say that you know this belongs to the daily half and this belongs to the Sunday half.

To me, being an intellectual doesn't mean knowing about intellectual issues; it means taking pleasure in them.

Man is unique not because he does science, and his is unique not because he does art, but because science and art equally are expressions of his marvelous plasticity of mind.

The great poem and the deep theorem are new to every reader, and yet are his own experiences, because he himself recreates them.

All science is the search for unity in hidden likenesses.