The basis for poetry and scientific discovery is the ability to comprehend the unlike in the like and the like in the unlike.

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.

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

Every animal leaves traces of what it was; man alone leaves traces of what he created.

The air in a man's lungs 10,000,000,000, 000,000,000,000 atoms, so that sooner or later every one of us breathes an atom that has been breathed before by anyone you can think of who has ever lived - Michelangelo or George Washington or Moses.

The child is not a prisoner of its inheritance; it holds its inheritance as a new creation which its future actions will unfold.

The largest single step in the ascent of man is the change from nomad to village agriculture.