The true is the name of whatever proves itself to be good in the way of belief, and good, too, for definite, assignable reasons.

If WE claim only reasonable probability, it will be as much as men who love the truth can ever at any given moment hope to have within their grasp.

A good hypothesis in science must have other properties than those of the phenomenon it is immediately invoked to explain, otherwise it is not prolific enough.

No matter how full a reservoir of maxims one may possess, and no matter how good one's sentiments may be, if one has not taken advantage of every concrete opportunity to act, one's character may remain entirely unaffected for the better.

I am only a philosopher, and there is only one thing that a philosopher can be relied on to do, and that is, to contradict other philosophers.

If any one phrase could gather its (religion's) universal message, that phrase would be, - All is not vanity in this Universe, whatever the appearances may suggest.

There can be no existence of evil as a force to the healthy-minded individual.