Rest not in your bodily circumcision, but seriously set upon that substantial work which is signified and designed thereby: cleanse your hearts from all filthiness and superfluity of naughtiness, which is fitly compared to the foreskin, which if not cut off, made persons profane, unclean, and odious in the sight of God. Compare Deuteronomy 30:6 Jeremiah 4:4, Jeremiah 9:25 Romans 2:28,29 Col 2:11.
Related Commentaries of Deuteronomy 10:16
Deuteronomy 10:16
16 Circumcise therefore the foreskin of your heart, and be no more stiffnecked.