Theophylact of Ohrid, on 1Thess 5:17

“Pray without ceasing.”

“The Apostle showed the path to constant joy, to unceasing prayer, and to thanksgiving. For whoever is accustomed to turning to God and thanks Him for everything that has served for his benefit — that person will obviously have constant joy. How then will you always give thanks? If you realize that it is the will of God for you to always be grateful to Him, as your constant benefactor in Christ Jesus, that is, through the cooperation of the Lord Jesus. For He Himself also cooperates with us in being thankful: He taught us to do that which we have learned from the Gospel.”

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