Jamieson, Fausset & Brown

we faint not--notwithstanding our sufferings. Resuming Co2 4:1. outward man--the body, the flesh. perish--"is wearing away"; "is wasted away" by afflictions. inward man--our spiritual and true being, the "life" which even in our mortal bodies (Co2 4:11) "manifests the life of Jesus." is renewed--"is being renewed," namely, with fresh "grace" (Co2 4:15), and "faith" (Co2 4:13), and hope (Co2 4:17-18).