By doubting we come at truth.

An independent reality in the ordinary physical sense can ... neither be ascribed to the phenomena nor to the agencies of observation.

Everything is vague to a degree you do not realize till you have tried to make it precise.

A scholar who cherishes the love of comfort is not fit to be deemed a scholar.

As a working hypothesis to explain the riddle of our existence, I propose that our universe is the most interesting of all possible universes, and our fate as human beings is to make it so.

Military justice is to justice what military music is to music.

Reason has insight only into that which it produces after a plan of its own.

Whatever crushes individuality is despotism, by whatever name it may be called and whether it professes to be enforcing the will of God or the injunctions of men.

We seem doomed to travel in only one direction, into the future.

To be ignorant of what happened before you were born is to be ever a child. For what is man's lifetime unless the memory of past events is woven with those of earlier times