It must thus be--( 1) An _end-in-itself_ pursued for its own sake; (2) it must farther be _self-sufficing_ leaving no outstanding wants--man's sociability being taken into account and gratified.

Happiness is such an end; but we must state more clearly wherein happiness consists.
This will appear, if we examine what is the work appropriate and peculiar to man.

Every artist, the sculptor, carpenter, currier (so too the eye and the hand), has his own peculiar work: and good, to him, consists in his performing that work well.

Man also has his appropriate and peculiar work: not merely living--for that he has in common with vegetables; nor the life of sensible perception--for that he has in common with other animals, horses, oxen, &c.

There remains the life of man as a rational being: that is, as a being possessing reason along with other mental elements, which last are controllable or modifiable by reason.