The man who acts never has any conscience; no one has any conscience but the man who thinks

Every day look at a beautiful picture, read a beautiful poem, listen to some beautiful music, and if possible, say some reasonable thing.

Not art and science only, but patience will be required for the work.

Error is to truth as sleep is to waking. I have observed that one turns, as if refreshed, from error back to truth.

Theories are usually the over-hasty efforts of an impatient understanding that would gladly be rid of phenomena, and so puts in their place pictures, notions, nay, often mere words.

The person of analytic or critical intellect finds something ridiculous in everything. The person of synthetic or constructive intellect, in almost nothing.

‎It has ever been my fate to give pain to those whose happiness I should have promoted.