Educating the mind without educating the heart is no education at all.

The happy life is regarded as a life in conformity with virtue. It is a life which involves effort and is not spent in amusement.

Anything that we have to learn to do we learn by the actual doing of it; People become builders by building and instrumentalists by playing instruments. Similarily, we become just by performing just acts, temperate by performing temperate ones, brave by performing brave ones.

All that one gains by falsehood is, not to be believed when he speaks the truth.

We have next to consider the formal definition of virtue.

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

Neither should men study war with a view to the enslavement of those who do not deserve to be enslaved; but first of all they should provide against their own enslavement, and in the second place obtain empire for the good of the governed, and not for the sake of exercising a general despotism, and in the third place they should seek to be masters only over those who deserve to be slaves.