“The article of justification is fragile. Not in itself, of course, but in us. I know how quickly a person can forfeit the joy of the Gospel. I know in what slippery places even those stand who seem to have a good footing in the matters of faith. In the midst of the conflict when we should be consoling ourselves with the Gospel, the Law rears up and begins to rage all over our conscience. I say the Gospel is frail because we are frail.
What makes matters worse is that one-half of ourselves, our own reason, stands against us. The flesh resists the spirit, or as Paul puts it, “The flesh lusteth against the Spirit.” Therefore we teach that to know Christ and to believe in Him is no achievement of man, but the gift of God. God alone can create and preserve faith in us. God creates faith in us through the Word. He increases, strengthens and confirms faith in us through His word. Hence the best service that anybody can render God is diligently to hear and read God’s Word. On the other hand, nothing is more perilous than to be weary of the Word of God. Thinking he knows enough, a person begins little by little to despise the Word until he has lost Christ and the Gospel altogether.
Let every believer carefully learn the Gospel. Let him continue in humble prayer. We are molested not by puny foes, but by mighty ones, foes who never grow tired of warring against us. These, our enemies, are many: Our own flesh, the world, the Law, sin, death, the wrath and judgment of God, and the devil himself”