“This teaches the equality of the Father and the Son. It shows that the Father and the Son administer one and the same divine economy, just as They create one and the same thing” (Theodoret). Therefore “may He direct” stands in the singular.
The tri-hypostatic God acts in us for salvation through the incarnate Only-begotten Son of God and the descended Holy Spirit, according to the good pleasure of the Father.
“May He direct our way to you.” “May He direct” means: may He indicate the time, remove obstacles, and arrange everything favorable to a peaceful journey.
The Apostle lived in surrender to God and directed all his steps according to indications from above. These were expressed inwardly by the full readiness of the heart, without opposition, or outwardly by a concurrence of circumstances calling him to particular undertakings and providing every convenience for them.
He appropriated nothing beforehand for himself, but left everything as God willed. St. Chrysostom says on this passage: “To pray not only inwardly, but also to set forth one’s prayer in an epistle, is the mark of extraordinary love. It is the mark of a soul fiery and truly irrepressible.
“He speaks as though saying: may God Himself end the temptations that hinder us from every side from having a straight path to you.” “May He fulfill our desire and destroy the difficulties encountered” (Theodoret). “May He drive away Satan, who everywhere places obstacles through temptations to prevent us from coming to you” (Oecumenius).