This branch of mathematics [Probability] is the only one, I believe, in which good writers frequently get results which are entirely erroneous.

It is impossible not to envy the man who can dismiss reason, although we know how it must turn out at last.

It is... easy to be certain. One has only to be sufficiently vague.

True science is distinctively the study of useless things. For the useful things will get studied without the aid of scientific men. To employ these rare minds on such work is like running a steam engine by burning diamonds.

The percept is the reality. It is not in propositional form. But the most immediate judgment concerning it is abstract. It is therefore essentially unlike the reality, although it must be accepted as true to that reality. Its truth consists in the fact that it is impossible to correct it, and in the fact that it only professes to consider one aspect of the percept.

A true proposition is a proposition belief which would never lead to such disappointment so long as the proposition is not understood otherwise than it was intended.

There is not a single truth of science upon which we ought to bet more than about a million of millions to one.