Thomas Aquinas, on Ps 39:16

“Let them immediately bear their confusion, that say to me: Tis well, tis well.”

“For the good he asks that they rejoice at his help and liberation, and praise God. And as to the first he says, "Let all who seek you exult and rejoice." As to the second, "And let those who love your salvation say always, The Lord be magnified." Here he presents four things that befit the good. First, that they love the salvation of God, which is Christ. Lk. 2: "My eyes have seen your salvation." Second, that they seek the acts of love. Song 3: "In my bed I sought," etc. Is. 55: "Seek the Lord while he may be found." Third, that they rejoice over the beloved found; hence, "Let them exult." Hab. 3: "Yet I will rejoice in the Lord," etc. Exultation pertains to the exterior signs of joy. As to the interior, joy is, as it were, gladness and expansion of the heart. Fourth, thanksgiving and praise; hence he says, "And let them say always, The Lord be magnified," etc. Is. 12: "Exult and praise, O dwelling of Zion, for great in your midst is the Holy One of Israel."”

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