“IF on the contrary the evils should be frequent and great, they will cause the happy man external annoyance and internal affliction, because internally they bring about sadness and externally they hinder good works. However they do not eliminate virtuous action entirely, because virtue makes good use even of misfortunes themselves. In this way the good of virtue shines forth insofar as a man gracefully endures frequent and great misfortunes, not because he may not feel the sorrow or sadness as the Stoics held but, being courageous and magnanimous, his reason does not succumb to such afflictions.
“This, in fact, was the difference between the Stoics and the Peripatetics, whose leader was Aristotle. The Stoics held that sorrow in no way afflicts a virtuous man, because, in their view, corporeal or external things are not in any sense a good of man. The Peripatetics, on the contrary, said that a virtuous man is affected by sadness, yet this does not overwhelm reason but is moderated by it. In their opinion corporeal and external things do not constitute the greatest but the least good of man and this in the degree that they help him.”
~St. Thomas Aquinas: Commentary on Aristotle’s Nicomachean Ethics, Bk. I, Lect. XVI.
