Circumcise, therefore, your heart Rest not in your bodily circumcision, or in any mere external observances or duties; but seriously set upon that substantial and most important circumcision of the heart and of the spirit which is signified by that of the flesh, and intended to be inculcated thereby: see Romans 2:28-29. Cleanse your hearts from all filthiness and superfluity of naughtiness; fitly compared to the foreskin, which, under the Jewish law, if not cut off, made persons profane, unclean, and odious in the sight of God.
Related Commentaries of Deuteronomy 10:16
Deuteronomy 10:16
16 Circumcise therefore the foreskin of your heart, and be no more stiffnecked.