It is a law, that every event depends on some law.

All political revolutions, not affected by foreign conquest, originate in moral revolutions. The subversion of established institutions is merely one consequence of the previous subversion of established opinions.

My father never permitted anything which I learnt to degenerate into a mere exercise of memory. He strove to make the understanding not only go along with every step of the teaching but...precede it.

A profound conviction raises a man above the feeling of ridicule.

Of two pleasures, if there be one which all or almost all who have experience of both give a decided preference, irrespective of any feeling of moral obligation to prefer it, that is the more desirable pleasure.

The peculiarity of the evidence of mathematical truths is that all the argument is on one side.

The demand for commodities is not the demand for labor.