Man should consider that God has pardoned him all the sins from which He has preserved him. Think not, therefore, that you may love this Master with a feeble love because He has pardoned you but a few sins. Your debt of love, on the contrary, is greater for His preventing grace which has saved you from committing many. For if a man must love a creditor who forgives him a debt, how much more reason has he to love a benefactor who gratuitously bestows upon him a like amount? For if a man live chastely all his life, it is God Who preserves him; if he be converted from immorality to a pure life, it is God Who reforms him; and if he continue in his disorders till the end, it is also God Who justly forsakes him.
--St. Augustine