And thou shalt bind them for a sign upon thine hand, and they shall be as frontlets between thine eyes. Thou shalt bind them for a sign upon thins hand - Is not this an allusion to an ancient and general custom observed in almost every part of the world? When a person wishes to remember a thing of importance, and is afraid to trust to the common operations of memory, he ties a knot on some part of his clothes, or a cord on his hand or finger, or places something out of its usual order, and in view, that his memory may be whetted to recollection, and his eye affect his heart. God, who knows how slow of heart we are to understand, graciously orders us to make use of every help, and through the means of things sensible, to rise to things spiritual.
And they shall be as frontlets - טטפת totaphoth seems to have the same meaning as phylacteries has in the New Testament; and for the meaning and description of these appendages to a Jew's dress and to his religion, see the notes on Exodus 13:9, and Matthew 23:5 (note), where a phylactery is particularly described.