St. Augustine Quote – Justification

“The righteousness of the law is proposed in these terms—that whosoever shall do it shall live in it; and the purpose is, that when each has discovered his own weakness, he may not by his own strength, nor by the letter of the law (which cannot be done), but by faith, conciliating the Justifier, attain, and do, and live in it.  For the work in which he who does it shall live, is not done except by one who is justified.  His justification, however, is obtained by faith;”

— St. Augustine; On the Spirit and the Letter, Chapter 51.