Sermon 215, 3 — as quoted by Pitre (p 137)
Who could ever comprehend this? Who could tell of it?
No freely usable English translation of this passage is online, so the note keeps Pitre's quotation and links to the full text. Translation: as quoted by Pitre (endnote).
Why Pitre cites it
'Who could ever comprehend this? Who could tell of it?' — Augustine on the mystery of the sealed womb and the sealed tomb.