A.T. Robertson Commentary 2 Corinthians 7:4

"Great is my boldness of speech toward you, great is my glorying on your behalf: I am filled with comfort, I overflow with joy in all our affliction." — 2 Corinthians 7:4 (ASV)

I overflow with joy in all our affliction (υπερπερισσευομα τη χαρα επ παση τη θλιψε ημων). A thoroughly Pauline sentiment. Περισσευω means to overflow, as we have seen. Hυπερ-περισσευω (late word, so far only here and Byzantine writers) is to have a regular flood. Vulgate superabundo.