Albert Barnes on 2 Timothy 4:7

I have fought a good fight. The Christian life is often represented as a conflict, or warfare. 1Timm 6:12. That noble conflict with sin, the world, the flesh, and the devil, Paul now says he had been able to maintain.

I have finished my course. The Christian life, too, is often represented as a race to be run. Comp. 1Cor 9:24, 1Cor 9:25, 1Cor 9:26.

I have kept the faith. I have steadfastly maintained the faith of the gospel; or, have lived a life of fidelity to my Master. Probably the expression means that he had kept his plighted faith to the Redeemer, or had spent a life in faithfully endeavouring to serve his Lord:

(a) "fought" 1Timm 6:12 (b) "finished" Acts 20:24 (c) "kept the faith" Prov 23:23, Rev 3:10