There are no whole truths: all truths are half-truths. It is trying to treat them as whole truths that plays to the devil.

No man of science wants merely to know. He acquires knowledge to appease his passion for discovery. He does not discover in order to know, he knows in order to discover.

We must produce a great age, or see the collapse of the upward striving of our race.

Great dreamers' dreams are never fulfilled, they are always transcended.

Heaven knows what seeming nonsense may not tomorrow be demonstrated truth.

Aristotle discovered all the half-truths which were necessary to the creation of science.

How the past perishes is how the future becomes.