The most important attribute of man as a moral being is the faculty of self-control.

The great aim of education is not knowledge but action.

In science the important thing is to modify and change one's ideas as science advances.

Those who cavalierly reject the Theory of Evolution, as not adequately supported by facts, seem quite to forget that their own theory it supported by no facts at all.

The freest form of government is only the least objectionable form. The rule of the many by the few we call tyranny: the rule of the few by the many is tyranny also; only of a less intense kind.

Volumes might be written upon the impiety of the pious.

To play billiards well is the sign of a misspent youth.