The Lord found the sheep when He restored man, and over that sheep that is found there is more joy in heaven than over the ninety and nine, because there is a greater matter for thanksgiving to God in the restoration of man than in the creation of the Angels. Wonderfully are the Angels made, but more wonderfully man restored.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: ap. Anselm