Thomas Aquinas, on Ps 33:3

“In the Lord shall my soul be praised: let the meek hear and rejoice.”

“Then when he says, "Magnify," he exhorts to praise. And first to interior praise. Second, to exterior, at "And let us exalt." As to the first he says, "Magnify the Lord with me." To magnify and to praise God are the same thing, because the goodness of God and his greatness are the same; because in those things that are not great in bulk, to be greater is the same as to be better, according to Augustine in On the Trinity. And therefore he says, "Magnify": Lk. 1: "My soul magnifies the Lord." And this corresponds to what he says, "I will bless the Lord." As to the second he says, "And let us exalt his name." That which is high in itself is said to be exalted when it is spread among many: Sir. 43: "Glorifying the Lord, exalt him as much as you can," etc. "Together," that is, in concord. And this corresponds to what he says, "His praise is always in my mouth."”

Imported from an open dataset — not yet checked against the printed edition.