“We add the verse Gloria to every psalm and canticle,
according to the ancient custom of the Eastern Church, which the great S. Jerome begged Pope S.
Damasus to institute here in the Western; to protest, that all the praises of men and angels are too
low to praise worthily the divine goodness, and that, to be worthily praised, itself must be its own
glory, praise and benediction”
Source: treatise on the Love of God, Chapter 12, Book 5