A body in motion can maintain this motion only if it remains in contact with a mover.

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.

For through wondering human beings now and in the beginning have been led to philosophizing.

Marriage is like retiring as a bachelor and getting a sexual pension. You don't have to work for the sex any more, but you only get 65% as much.

In [the soul] one part naturally rules, and the other is subject, and the virtue of the ruler we maintain to be different from that of the subject; the one being the virtue of the rational, and the other of the irrational part. Now, it is obvious that the same principle applies generally, and therefore almost all things rule and are ruled according to nature.

No notice is taken of a little evil, but when it increases it strikes the eye.

And, speaking generally, passion seems not to be amenable to reason, but only to force.