There is a kind of courtesy in skepticism. It would be an offense against polite conventions to press our doubts too far.

There are three traps that strangle philosophy: The church, the marriage bed, and the professor's chair.

Fear first created the gods.

Old places and old persons in their turn, when spirit dwells in them, have an intrinsic vitality of which youth is incapable, precisely, the balance and wisdom that come from long perspectives and broad foundations

If all art aspires to the condition of music, all the sciences aspire to the condition of mathematics.

People are usually more firmly convinced that their opinions are precious than that they are true.

What better comfort have we, or what other Profit in living Than to feed, sobered by the truth of Nature, Awhile upon her beauty, And hand her torch of gladness to the ages Following after?