a few quotes from "Help! My Halo's Slipping: The Saga of a first-Term Missionary" by Larry Dinkins, which i'm currently reading:

"If we succeed without suffering, it is because others have suffered before us. If we suffer without success, it is that others may succeed after us." -- son of Adoriram Judson

"God does not waste suffering, nor does He discipline out of caprice. If He plow, it is because He purposes a crop." -- J.O. Sanders