1. Srila Prabhupada teaches SB 10.14.8

    A devotee always accepts his distress as minimized by God’s Mercy, although he would have to suffer many more times the suffering. Anyone who accepts this philosophy of God’s Mercy in suffering conditions, and still makes progress in Krishna Consciousness, it is said that he is sure to go back to Home, Back to Godhead.

    From Srila Prabhupada’s letter to Gurudasa — Los Angeles 13 February, 1968