Theodoret of Cyrus
Moses emphasized the type of circumcision that is acceptable to God. He stated, "Circumcise your hard heart, and you shall not harden your neck thereby." This instruction was given to those who had not yet undergone the physical circumcision of the foreskin, as Joshua performed their circumcision after the Israelites crossed the Jordan at Gilgal. However, he also instructed them, who had not been circumcised, to turn away from hard-heartedness and cruelty, highlighting that the circumcision of the heart holds far greater significance. The Lord addressed the Israelites through the prophet Jeremiah, declaring, "All the Gentiles are uncircumcised in the flesh, but the house of Israel are uncircumcised in their hearts" (Jeremiah 9:26).