If merely 'feeling good' could decide, drunkenness would be the supremely valid human experience.

A new opinion counts as true just in proportion as it gratifies the individual's desire to assimilate the novel in his experience to his beliefs in stock

Science, like life, feeds on its own decay. New facts burst old rules; then newly divined conceptions bind old and new together into a reconciling law.

Metaphysics means nothing but an unusually obstinate effort to think clearly.

How to gain, how to keep, how to recover happiness is in fact for most men at all times the secret motive of all they do, and of all they are willing to endure.

Footnotes -- little dogs yapping at the heels of the text

If you want a quality, act as if you already had it.