Ask an impertinent question and you are on the way to the pertinent answer.

There are three creative ideas which, each in its turn, have been central to science. They are the idea of order, the idea of causes, and the idea of chance.

The world can only be grasped by action, not by contemplation.

Whether our work is art or science or the daily work of society, it is only the form in which we explore our experience which is different.

There is no absolute knowledge. And those who claim it, whether they are scientists or dogmatists, open the door to tragedy.

The act of imagination is the opening of the system so that it shows new connections. Every act of act of imagination is the discovery of likenesses between two things which were thought unlike. An example is Newton’s thinking of the likeness between the thrown apple and moon sailing majestically in the sky. Hence, the ‘discovery’ of the laws of gravity.

Fifty years from now if an understanding of man's origins, his evolution, his history, his progress is not in the common place of the school books we shall not exist.