Aristotle

If it be asked whether Tragedy is now all that it need be in its formative elements, to consider that, and decide it theoretically and in relation to the theatres, is a matter for another inquiry.

Courage, therefore, brings pain, and is justly praised; for it is harder to endure what is painful than to abstain from what is pleasant.

And the more he is endowed with every virtue, and the happier he is, the more grievous will death be to him; for life is more worth living to a man of his sort than to anyone else, and he deprives himself knowingly of the very best things; and it is painful to do that. But he is no less courageous because he feels this pain; nay, we may say he is even more courageous, because in spite of it he chooses noble conduct in battle in preference to those good things.