Jamieson, Fausset and Brown on Ephesians 3:13

13. "I entreat you not to be dispirited."

for you--in your behalf.

which is--rather, "which are your glory," namely, inasmuch as showing that God loved you so much, as both to give His Son for you, and to permit His apostles to suffer "tribulations" for you [Chrysostom] in preaching the Gospel to the Gentiles. See on Ep 3:1, "prisoner for you Gentiles." My tribulations are your spiritual "glory," as your faith is furthered thereby (1Co 4:10).