The series of integers is obviously an invention of the human mind, a self-created tool which simplifies the ordering of certain sensory experiences.

Nothing happens unless something moves.

What a deep faith in the rationality of the structure of the world and what a longing to understand even a small glimpse of the reason revealed in the world there must have been in Kepler and Newton to enable them to unravel the mechanism of the heavens in long years of lonely work!

People like us, who believe in physics, know that the distinction between past, present, and future is only a stubbornly persistent illusion.

A life directed chiefly toward the fulfillment of personal desires will sooner or later always lead to bitter disappointment.

The further the spiritual evolution of mankind advances, the more certain it seems to me that the path to genuine religiosity does not lie through the fear of life, and the fear of death, and blind faith, but through striving after rational knowledge.

The tyranny of the ignoramuses is insurmountable and assured for all time.