Take a hard stone . . .

Take are hard stone with sharp corners. Knock it and rub it against other stones, until its sharpness and hardness are crushed by the knocking and rubbing and, at last, it is made round. So too, take a soul that is rough and abrupt. Put it into the community and company of tough short-tempered men. One of two things must happen: Either it learns through patience to cure its wound, or it will run away and, by so doing, it will learn its weakness, its cowardly flight showing it up as if in a mirror.

St. John Climacus