The trouble with the younger generation is that they don't stay young for very long.

The secret to creativity is knowing how to hide your sources.

If you want to make your children brilliant, tell them fairy tales. If you want to make them more brilliant, tell them more fairy tales.

When forced to summarize the general theory of relativity in one sentence: Time and space and gravitation have no separate existence from matter.

It is my view that the vegetarian manner of living, by its purely physical effect on the human temperament, would most beneficially influence the lot of mankind.

Time is an illusion.

A conflict arises when a religious community insists on the absolute truthfulness of all statements recorded in the Bible. This means an intervention on the part of religion into the sphere of science; this is where the struggle of the Church against doctrines of Galileo and Darwin belongs.