Wherefore I beg that ye faint not at my tribulations for you. A very delicate and touching request, that they would not be too much distressed by what he was suffering for them (comp. Epaphroditus, Philippians 2:26).
Paul knew that the sympathy was so strong that what was suffered by him was endured sympathetically by them. Two expressions denote that the sufferings were great: "My tribulations for you"—a word expressing intense and protracted suffering; "that ye faint not," or that ye do not lose heart, as if the power of evil had got the upper hand.
Which is your glory. That is, the character or capacity of the apostle of Jesus Christ to the Gentiles, in which I suffer tribulation, is one of such exalted dignity as to reflect glory on you. Take that view of my sufferings; I suffer because I hold so glorious an office, and the glory of that office is reflected on you.