The cross of the Lord is the key by which closed things can be opened. (Augustine, EnPs 45[46], 1; PL 36, 514)

Our slow hearts would not follow did Truth not see fit to walk even with the slow. (De continentia, 4)

Don’t live, then, according to your own lights; that’s how you got lost–but you were sought. No, don’t live by your own lights; that’s how you got lost–but you were found. (De continentia, 11)

It’s good for a sinner to be brought low. No one is more incurable than one who thinks himself healthy (Augustine, EnPs 58[59], II, 8; PL 36, 711).

You’re so blind you’re also deaf (Augustine, EnPs 63[64], 11; PL 36, 765).

The soul’s natural warmth is the love of God. (Aquinas on Ps 13:1)