This resolution is to be faithful servants of the Lord. It was expressed in the words, "I renounce Satan" and "I unite myself to Christ."
For just before, he said that sin no longer possesses us and has no tyrannical power over us, because grace has freed us from it.
From these words someone might infer: then I need not be concerned. Grace will do everything for me.
There is no need for me to beware, foresee, or strain my powers in battle. Everything will of itself flow favorably. I may live carelessly.
It is true that grace accomplishes everything and is always ready with its help. But it always acts in connection and agreement with the inclinations of man's will.
It comes to the aid of the one who labors when he lacks strength to complete some work.
Therefore, in life, grace remains grace, and free resolutions remain free resolutions.
Neither grace without these resolutions, nor these resolutions without grace, do anything. They act together.
So do not grow slack when you hear that sin no longer rules over you because of grace. Rather, preserve the original tension of resisting sin.
Sin does not rule when you resist it, and grace helps you because of your resistance.
But let your hands fall, give yourself to negligence, and weaken your hatred of sin. Sin will approach, deceive, carry you away, and again take possession of you.
For grace will not do the work for you when you let your hands fall.
When you abandon the work of resisting sin, grace will withdraw from you, and you will remain alone.
Once left alone, you will not overcome sin, and you will fall.
So that such relaxation may not occur, the apostle warns: what then? Shall we sin?
Shall we abandon every care to beware of sin, close our eyes, and let our hands fall?
No, he says. Be always on guard and fully armed.
Chrysostom sees this instruction in these words: "Having comforted the hearer by the preceding words, that sin no longer possesses him, the apostle safeguards him by counsel, which he presents as an objection."
Oecumenius sets forth the same thought more clearly: "So that the hearer would not become negligent and careless on hearing that sin no longer possesses him because of the grace that guards him, the apostle strengthens him.
He speaks as if saying: if we do not bend ourselves under sin, we shall not be taken captive by it."
But since the tensions of the will depend on the force of the motives surrounding it, the holy apostle, after saying generally "By no means," encourages resistance to sin.
He does this by presenting the destructive consequences of indulging sin and the great blessings that come from faithfulness to the once-adopted resolution to live holily according to God's will.
On the one side are slavery and death. On the other are freedom and life.
The apostle explains this in various ways to the end of the chapter.