2 Corinthians 4:16 (BSB)

Therefore we do not lose heart. Though our outer self is wasting away, yet our inner self is being renewed day by day.

From 2 Corinthians 4. Also in the ESV.

Commentary on 2 Corinthians 4:16

• John Calvin (Reformed), Calvin's Commentaries on 2 Corinthians 4:16: 16. For which cause we faint not “For which cause we faint not. (οὐκ ἐκκακοῦμεν) Here we have the same various reading,” (as in verse 1,) “οὐκ ἐγκακοῦμεν — we do no wickedness; and it is supported by BDEFG, and some others; but it is remarkable that Mr.
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on 2 Corinthians 4:8-18: In these verses the apostle gives an account of their courage and patience under all their sufferings, where observe, I. How their sufferings, and patience under them, are declared, Co2 4:8-12. The apostles were great sufferers; therein they followed their Master: Christ had told them that in the world they should have tribulation, and so they had; yet they met with wonderful support, great relief...
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on 2 Corinthians 4:16: For our light affliction,.... The difference between the present and future state of the saints is here expressed, the disparity between them shown, and the influence the one has upon the other. The present state is a state of "affliction".
• Albert Barnes (Presbyterian), Barnes' New Testament Notes on 2 Corinthians 4:16: Verse 16. For which cause. With such an object in view, and sustained by such elevated purposes and desires. The sense is, that the purpose of trying to save as many as possible would make toil easy, privations welcome, and would be so accompanied by the grace of God, as to gird the soul with strength, and fill it with abundant consolations. We faint not.