The majesty of God surpasses by far our capacity for expression, because it is better to think of God than to talk of Him, and better is He still than what is thought.
(De Trinitate VII, 4,7)
The absence of the Lord is not an absence. Just believe, and the one who you do not see is with you.
Man himself, so much admired, is a great mystery.
(Sermo 126, 4)