But what is called the function of a man of any profession and the function of a man who is good in that profession are generically the same, e.g. of a harper and of a good harper; and this holds in all cases without exception, only that in the case of the latter his superior excellence at his work is added; for we say a harper’s function is to harp, and a good harper’s to harp well.

(Man’s function then being, as we say, a kind of life⁠—that is to say, exercise of his faculties and action of various kinds with reason⁠—the good man’s function is to do this well and beautifully [or nobly]. But the function of anything is done well when it is done in accordance with the proper excellence of that thing. ) 13