The excellence of a thing is related to its proper function.
Love is composed of a single soul inhabiting two bodies.
All men desire by nature to know.
For good is simple, evil manifold.
The aim of education is to make the pupil like and dislike what he ought....The little human animal will not at first have the right responses. It must be trained to feel pleasure, liking, disgust, and hatred at those things which really are pleasant, likable, disgusting, and hateful.
It is our actions and the soul's active exercise of its functions that we posit (as being Happiness).