To criticize a particular subject, therefore, a man must have
been trained in that subject: to be a good critic generally, he must have had an all-round
education. Hence the young are not fit to be students of Political Science. For they
have no experience of life and conduct, and it is these that supply the premises and
subject matter of this branch of philosophy.
And moreover
they are led by their feelings; so that they will study the subject to no purpose or
advantage, since the end of this science is not knowledge but action. And it makes no difference whether they are young in years or immature
in character: the defect is not a question of time, it is because their life and its
various aims are guided by feeling; for to such persons their knowledge is of no use, any
more than it is to persons of defective self-restraint.
-- Aristotle, Nicomachean Ethics 1095
