If, then, there is some end of the things we do, which we desire for its own sake (everything else being desired for the sake of this), and if we do not choose everything for the sake of something else (for at that rate the process would go on to infinity, so that our desire would be empty and vain), clearly this must be the good and the chief good.
AristotleThe body is most fully developed from thirty to thirty-five years of age, the mind at about forty-nine.
Aristotle[this element], the seat of the appetites and of desire in general, does in a sense participate in principle, as being amenable and obedient to it
Aristotle