The wise man does not expose himself needlessly to danger, since there are few things for which he cares sufficiently but he is willing, in great crises, to give even his life - knowing that under certain conditions it is not worthwhile to live.

There is no great genius without a mixture of madness.

A great city is not to be confounded with a populous one.

Happiness depends upon ourselves.

Politicians also have no leisure, because they are always aiming at something beyond political life itself, power and glory, or happiness.