But if these words are referred to what follows, their meaning is this. I teach nothing that exceeds human powers and judgment. Rather, I speak in human terms because of the weakness of your flesh.
What does this mean? It means this: when you served sin, you were free from righteousness. That is, you did not submit at all to the laws of justice.
Therefore you made your members slaves of sinful uncleanness, and added lawlessness to lawlessness. So now, when you have been freed from sin and enslaved to righteousness, it is fitting and righteous for you to be holy, making your members slaves of virtue.
Indeed, it lies in our will to turn our members to the service either of virtue or of sin.
When we lift our eyes to the works of God in order to contemplate more carefully in them the Creator's goodness, omnipotence, wisdom, and providence, then we make our eyes servants of virtue.
But when we turn them to God's creatures only to gaze upon their beauty and stir up in our heart a desire for vanity and the lust of the flesh, then we make our eyes slaves of sin.
If we open our ears to hear the voice of the Lord God, and hymns and doxologies sung for His glorification, then our ears become slaves in the work of our salvation.
But if we open them to hear slanders, shameful speech, dishonorable and passionate songs, then they become slaves of deeds that prepare torment for us.
If our tongue hymns God, proclaims His teaching, comforts or gives counsel to our neighbor, then it is an instrument of virtue. But when it utters blasphemies against the Creator, falsehood, deceits, false accusations, and harmful counsel against our neighbor, it becomes an instrument of sin.
We stretch out our hands by our own will, sometimes upward for the glorification of God, and sometimes downward to seize another's property. With our feet we sometimes hasten to help our neighbor, and sometimes to harm him.
Thus we dedicate our members to the service now of virtue, now of sin, and from this we receive either holiness or defilement. But hear also by what proofs the divine Apostle strives to incline Christians to enslave themselves to the lightest yoke of virtue.