Good moral character is not something that we can achieve on our own. We need a culture that supports the conditions under which self-love and friendship flourish.

Now it is evident that the form of government is best in which every man, whoever he is, can act best and live happily.

Everybody loves a thing more if it has cost him trouble: for instance those who have made money love money more than those who have inherited it.

Friendship is essentially a partnership.

We become just by the practice of just actions, self-controlled by exercising self-control, and courageous by performing acts of courage.

It is clear, then, that the earth must be at the centre and immovable, not only for the reasons already given, but also because heavy bodies forcibly thrown quite straight upward return to the point from which they started, even if they are thrown to an infinite distance. From these considerations then it is clear that the earth does not move and does not lie elsewhere than at the centre.

A life of wealth and many belongings is only a means to happiness. Honor, power, and success cannot be happiness because they depend on the whims of others, and happiness should be self-contained, complete in itself.