Music has the power of producing a certain effect on the moral character of the soul, and if it has the power to do this, it is clear that the young must be directed to music and must be educated in it.

Neither by nature, then, nor contrary to nature do the virtues arise in us; rather we are adapted by nature to receive them, and are made perfect by habit.

The greatest of all pleasures is the pleasure of learning.

The high-minded man does not bear grudges, for it is not the mark of a great soul to remember injuries, but to forget them.

Selfishness doesn't consist in a love to yourself, but in a big degree of such love.

...in this way the structure of the universe- I mean, of the heavens and the earth and the whole world- was arranged by one harmony through the blending of the most opposite principles.

A bad man can do a million times more harm than a beast.