5 and you shall love Yahweh your God with all your heart, and with all your soul, and with all your might.
*Minor differences ignored. Grouped by changes, with first version listed as example.
Since there is but One God, and that God is Israel's God, so Israel must love God unreservedly and entirely. The "heart" is mentioned as the seat of the understanding; the "soul" as the center of will and personality; the "might" as representing the outgoings and energies of all the vital powers.
The New Testament itself requires no more than this total self-surrender of man's being to his maker Matthew 22:37. The Gospel differs from the Law not so much in replacing an external and carnal service of God by an inward and spiritual one, as in supplying new motives and special assistances for the attainment of that divine love which was, from the first and all along, enjoined as "the first and great commandment."
Thou shalt love the Lord, etc. - Here we see the truth of that word of the apostle, 1-Timothy 1:5 : Now the End of the Commandment is Love out of a pure heart, etc. See the whole of the doctrine contained in this verse explained on Matthew 22:36-40 (note).
And thou shalt love the Lord thy God,.... Which is the first and chief commandment in the law, the sum and substance of the first table of it; and includes in it, or at least has connected with it, knowledge of God, esteem of him, delight in him, faith and trust in him, fear and worship of him, and obedience to him, which when right springs from it. God is to be loved because of the perfections of his nature, and the works of his hand, of nature, providence, and grace; and because of the relations he stands in to men, and especially to his own people; and because of his peculiar love to them; and, indeed, he is to be loved by all men for his care of them, and blessings of goodness bestowed on them; the manner in which this is to be done follows:
with all thine heart, and with all thy soul, and with all thy might; with a superlative love, above all creatures whatever; with the whole of the affections of the heart, with great fervency and ardour of spirit, in the sincerity of the soul, and with all the strength of grace a man has, with such love that is as strong as death. Jarchi interprets loving God with all the heart, that is, with thy heart not divided about God, a heart not divided between God and the creature; "all thy might" he interprets of mammon or substance; and, indeed, that is one way in which men may show their love to God, by laying out their substance in his service, and for the support of his cause and interest in the world. Aben Ezra by "the heart" understands knowledge, and by the "soul" the spirit of man that is in his body, and by might perfect love in the heart.
As the one God, therefore, Israel was to love Jehovah its God with all its heart, with all its soul, and with all its strength. The motive for this is to be found in the words "thy God," in the fact that Jehovah was Israel's God, and had manifested Himself to it as one God. The demand "with all the heart" excludes all half-heartedness, all division of the heart in its love. The heart is mentioned first, as the seat of the emotions generally and of love in particular; then follows the soul (nephesh) as the centre of personality in man, to depict the love as pervading the entire self-consciousness; and to this is added, "with all the strength," sc., of body and soul. Loving the Lord with all the heart and soul and strength is placed at the head, as the spiritual principle from which the observance of the commandments was to flow (see also Deuteronomy 11:1; Deuteronomy 30:6). It was in love that the fear of the Lord (Deuteronomy 10:12), hearkening to His commandments (Deuteronomy 11:13), and the observance of the whole law (Deuteronomy 11:22), were to be manifested; but love itself was to be shown by walking in all the ways of the Lord (Deuteronomy 11:22; Deuteronomy 19:9; Deuteronomy 30:16). Christ therefore calls the command to love God with all the heart "the first and great commandment," and places on a par with this the commandment contained in Leviticus 19:8 to love one's neighbour as oneself, and then observes that on these two commandments hang all the law and the prophets (Matthew 22:37-40; Mark 12:29-31; Luke 10:27).
(Note: In quoting this commandment, Matthew (Matthew 22:37) has substituted δαίνοια, "thy mind," for "thy strength," as being of especial importance to spiritual love, whereas in the lxx the mind (διάνοια) is substituted for the heart. Mark (Mark 12:30) gives the triad of Deuteronomy (heart, soul, and strength); but he has inserted "mind" (διάνοια) before strength (ἰσχύς), whilst in Mark 12:33 the understanding (σύνεσις) is mentioned between the heart and the soul. Lastly, Luke has given the three ideas of the original passage quite correctly, but has added at the end, "and with all thy mind" (διάνοια). Although the term διάνοια (mind) originated with the Septuagint, not one of the Evangelists has adhered strictly to this version.)
Even the gospel knows no higher commandment than this. The distinction between the new covenant and the old consists simply in this, that the love of God which the gospel demands of its professors, is more intensive and cordial than that which the law of Moses demanded of the Israelites, according to the gradual unfolding of the love of God Himself, which was displayed in a much grander and more glorious form in the gift of His only begotten Son for our redemption, than in the redemption of Israel out of the bondage of Egypt.
And thou shalt love the Lord thy God with all thine heart - And is this only an external commandment? Can any then say, that the Sinai - covenant was merely external? With all thy heart - With an entire love. He is One; therefore our hearts must be united in his love. And the whole stream of our affections must run toward Him. O that this love of God may be shed abroad in our hearts.
*More commentary available at chapter level.