"Momentary, light affliction" is opposite of "eternal, weighty glory".
"For our light affliction, which is but for a moment, worketh for us a far more exceeding and eternal weight of glory." ~ 2 Corinthians 4:17
Here's an interesting insight into this scripture, courtesy of Oswald Chambers book "The Love of God - The Message of Invincible Consolation". Chambers says: "Whenever Paul tries to state the unfathomable joy and glory which he has in the heavenlies in Christ Jesus, it is as if he cannot find words to express his meaning. In order to try to express it here he balances his words.
For instance, "affliction" is matched with "glory";
"light" is matched with "weight";
and "moment" is matched with "eternal".
I wonder if we balance our words like that?"