Deuteronomy 10:16

Circumcise... your heart. — “For circumcision is that of the heart, in the spirit, and not in the letter” (Romans 2:29). The verse literally runs thus: Circumcise the foreskin of your heart, and ye will harden your neck no more. It is the same line of thought as St. Paul’s (Galatians 5:16) “Walk in the Spirit, and (then) ye will not fulfil the lust of the flesh.”

(17,18) A great God, a mighty, and a terrible... he doth execute the judgment of the fatherless and widow. — “Behold (says Rashi) His might! And close beside His might thou mayest find His humility.” It is not otherwise in later passages of Scripture: “He healeth the broken in heart, and bindeth up their wounds. He telleth the number of the stars, and calleth them all by their names.”