Theophan the Recluse
In order for this teaching to penetrate the soul more deeply and effectively, it was commanded that the faithful should learn the commandments, inscribing their words upon their hands so that they might be ever-present before their eyes, and writing them on the doorposts and gates, as well as on the fringes of their garments (Deuteronomy 6:8-9). The son of Israel was thus continually reminded of the tenets of his faith at every turn, ensuring he was instructed in it at all times. Only through carelessness could he remain uninformed about his covenant, his justifications, commandments, and judgments.