The earth has music for those who listen.

In each person I catch the fleeting suggestion of something beautiful and swear eternal friendship with that.

We are not compelled in naturalism, or even in materialism, to ignore immaterial things; the point is that any immaterial things which are recognized shall be regarded as names, aspects, functions, or concomitant products of those physical things among which action goes on.

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

The quality of wit inspires more admiration than confidence

Facts are all accidents. They all might have been different. They all may become different. They all may collapse altogether.

Repetition is the only form of permanence that Nature can achieve.