But the word is very near unto you, in your mouth, and in your heart, that you may do it.
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Clement Of Alexandria
AD 215
“Anyone who tries to act highhandedly annoys God,” says Scripture. For bombast is a spiritual vice. Scripture tells us to repent from it as from the other vices by turning from disharmony and by linking ourselves to a change for the better through the three instruments of mouth, heart and hands.
Heart. Septuagint add, "and in thy hands. "Thou art often obliged to talk about the law, and to learn it by heart. Nothing hinders thee, with the grace of God, from putting it in practice. (Calmet)
No teacher could more plainly inculcate the liberty of the human will. (Theodoret, q. 38.; St. Augustine, de Nat. 69.; St. Ambrose;) (Worthington)