No delusion is greater than the notion that method and industry can make up for lack of mother-wit, either in science or in practical life.

The known is finite, the unknown infinite; spiritually we find ourselves on a tiny island in the middle of a boundless ocean of the inexplicable. It is our task, from generation to generation, to drain a small amount of additional land.

Surely it must be plain that an ingenious man could speculate without end on both sides, and find analogies for all his dreams. Nor does it help me to tell me that the aspirations of mankind

History warns us that it is the customary fate of new truths to begin as heresies and to end as superstitions.

No man is any the worse off because another acquires wealth by trade, or by the exercise of a profession; on the contrary, he cannot have acquired his wealth except by benefiting others to the extent of what they considered to be its value.

The man of science has learned to believe in justification, not by faith, but by verification.

There are savages without God in any proper sense of the word, but none without ghosts.