Yes, one must suffer, even in vain, so as not to have lived in vain. – Antonio Porchia, Voces, 1943, translated from Spanish by W.S. Merwin

Affliction comes to us all, not to make us sad, but sober; not to make us sorry, but to make us wise; not to make us despondent, but by its darkness to refresh us as the night refreshes the day; not to impoverish, but to enrich us. – Henry Ward Beecher

The gem cannot be polished without friction nor man without trials. – Confucius

Aversion is a form of bondage. We are tied to what we hate or fear. That is why, in our lives, the same problem, the same danger or difficulty, will present itself over and over again in various prospects, as long as we continue to resist or run away from it instead of examining it and solving it. РPata̱jali