St Francis De Sales

"To persevere in the devout life it is a matter of deciding upon some excellent and generous maxims, with the right intention. The first I would suggest to you is that of Saint Paul, “All turns out well for those who love God.” [cf. Rom 8:28] If we agree that God can and does draw good out of evil, will He not do that especially for those who give themselves to Him without reserve? Even our very sins (from which may God preserve us!) are destined by Providence for the good of those who serve God. If David had not sinned, he would not have learned his deep sense of humility! … (Letters 1420; O. XVIII, p. 209)