Apostle Paul is speaking to you and me here. We are all struggling with the common calamities of human life, struggling with the opposition of the powers of darkness. We have many enemies who will keep us from God and Heaven. But glory be to God, we have a Captain we fight for; we have a banner we fight under. Paul is saying here that he had kept the doctrine of the Gospel and had never betrayed or removed any portion out of it. It is a good fight a good warfare. The victory is assured – if we continue faithful and courageous.
It is a great comfort to a dying saint when he can look upon his past and say with Apostle Paul that, “I have fought the good fight, I have kept the faith, I have kept the doctrine of the Gospel and the grace of faith”. Towards the end of our days, if we can also have this opportunity, this type of grace, what unspeakable comfort will it be to be able to talk in this manner!
Source: SCOAN HQ