Character gives us qualities, but it is in our actions — what we do — that we are happy or the reverse.

You are what you repeatedly do

For though we love both the truth and our friends, piety requires us to honor the truth first.

It is the repeated performance of just and temperate actions that produces virtue.

Metaphysics involves intuitive knowledge of unprovable starting-points concepts and truth and demonstrative knowledge of what follows from them.

Happiness involves engagement in activities that promote one's highest potentials.

The man who is content to live alone is either a beast or a god.