Jealousy is both reasonable and belongs to reasonable men, while envy is base and belongs to the base, for the one makes himself get good things by jealousy, while the other does not allow his neighbour to have them through envy.

All men by nature desire knowledge.

The one exclusive sign of thorough knowledge is the power of teaching.

Those who educate children well are more to be honored than they who produce them for these only gave them life, those the art of living well.

The ultimate value of life depends upon awareness and the power of contemplation rather than upon mere survival.

In poverty and other misfortunes of life, true friends are a sure refuge. The young they keep out of mischief to the old they are a comfort and aid in their weakness, and those in the prime of life they incite to noble deeds.

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.

The ideal man bears the accidents of life with dignity and grace, making the best of circumstances.

The energy of the mind is the essence of life.

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