Necro'ing this (sorry... notsorry) with another thought.
1st Corinthians 13:13 says:
And now these three remain: faith, hope and love. But the greatest of these is love.
Per the WoJ quoted previously, we have a definitive answer.
But I wonder if that was one of those occasional lies he uses. Like, sure... "True Hope" addresses despair, and the Hopeful will burn a Skavis-whamp; but perhaps (I suggest) so will Love.
I'm not at all convinced of this, but Jim has given us plenty of signals that he's drawing heavily on the Bible for large swaths of his world-building, and "love" in particular looms large in the Dresdenverse...