38. The apostle here speaks with varied expression. He leaves little honor and glory, as it were, for free-will, but desires for his followers the heavenly power imparted through the Holy Spirit. There is also a power of the world, and a spirit—the devil, the prince of the world, who blinds and hardens men's hearts. He boasts of himself and imparts to men a spirit of daring in his purpose to suppress and exterminate Christian doctrine. But while worldings are courageous and daring, so are Christians, and the latter are greater and far more powerful through the Holy Spirit, and are undaunted by the world, the devil, death and all kinds of misfortune. This is real spiritual strength. The Hebrew word "spirit" might well be rendered "bold, undaunted courage." Spiritual strength is not the strength of muscle and bone; it is true courage—boldness of heart. Weakness, on the contrary, is faint-heartedness, timidity, lack of courage.
39. Paul's meaning, then, is: "I desire for you, and pray God to grant you, that bold, dauntless courage and that strong, cheerful spirit which will not be terrified by poverty, shame, sin, the devil or death, but is confident that nothing can harm us and we will never be in need." The courage of the world—the spirit of the world—holds out only until exhaustion of the stores whereon it relies. As the saying is, "Wealth gives temporal boldness, but the soul must rely on God alone." The boldness resulting from riches and worldly power is haughty and makes its boast in earthly things. But the soul has no hoarded treasure. In God alone it braves every evil; it has a courage and heart very different from that of the world.
This is the strength for which Paul prays on behalf of his converts, a strength not inherent in flesh and blood. The possessor thereof does not rely and build on his own powers and riches, nor upon any human help and support. This strength dwells in the inner man. It is the trust of the dauntless, cheerful heart in God's grace and assistance, and in these alone. The heart which so trusts has no fear. It possesses by faith abundance of riches and pleasures—God himself with all his blessings. At the same time, to human sight only want, weakness and terror may be apparent.
"That Christ may dwell in your hearts through faith."
40. The Holy Spirit brings Christ into the heart and teaches it to know him. He imparts warmth and courage through faith in Christ. Paul everywhere intimates that no man should presume to approach God otherwise than through Christ, the one Mediator. Now, if Christ dwells in my heart and regulates my entire life, it matters not though my faith be weak. Christ is not mere bone but also flesh. Yes, he has blisters and boils and sins of which he is not ashamed, notwithstanding the eminent saints may hold their noses thereat. And where he dwells all fullness is, let the individual be weak or strong as God permits.