Real culture lives by sympathies and admirations, not by dislikes and disdains; under all misleading wrappings it pounces unerringly upon the human core.

[There are, in us] possibilities that take our breath away, and show a world wider than either physics or philistine ethics can imagine. Here is a world in which all is well, in spite of certain forms of death, death of hope, death of strength, death of responsibility, of fear and wrong, death of everything that paganism, naturalism and legalism pin their trust on.

Genius... means little more than the faculty of perceiving in an unhabitual way.

To know one thing thoroughly would be to know the universe.

Good-humor is a philosophic state of mind; it seems to say to Nature that we take her no more seriously than she takes us. I maintain that one should always talk of philosophy with a smile.

True ideas are those that we can assimilate, validate, corroborate, and verify. False ideas are those that we cannot

Ninety-nine hundredths or, possibly, nine hundred and ninety-nine thousandths of our activity is purely automatic and habitual, from our rising in the morning to our lying down each night.