Although the time of death is approaching me, I am not afraid of dying and going to Hell or (what would be considerably worse) going to the popularized version of Heaven. I expect death to be nothingness and, for removing me from all possible fears of death, I am thankful to atheism.

Jokes of the proper kind, properly told, can do more to enlighten questions of politics, philosophy, and literature than any number of dull arguments.

Having no unusual coincidence is far more unusual than any coincidence could possibly be.

Self-education is, I firmly believe, the only kind of education there is.

A scientist is as weak and human as any man, but the pursuit of science may ennoble him even against his will.

The human mind works at low efficiency. Twenty percent is the figure usually given. When, momentarily, there is a flash of greater power, it is termed a hunch, or insight, or intuition.

It seems to me that God is a convenient invention of the human mind