This the first tend great commandment - This commandment is found in Deuteronomy 6:5. It is the "first" and greatest of all; first, not in "order of time," but of "importance; greatest" in dignity, in excellence, in extent, and duration. It is the fountain of all others. All beings are to be loved according to their excellence. As God is the most excellent and glorious of all beings, he is to be loved supremely. If he is loved aright, then our affections will be directed toward all created objects in a right manner.

This is the first and great commandment - It is so,
1. In its antiquity, being as old as the world, and engraven originally on our very nature.
2. In dignity; as directly and immediately proceeding front and referring to God.
3. In excellence; being the commandment of the new covenant, and the very spirit of the Divine adoption.
4. In justice; because it alone renders to God his due, prefers him before all things, and secures to him his proper rank in relation to them.
5. In sufficiency; being in itself capable of making men holy in this life, and happy in the other.
6. In fruitfulness; because it is the root of all commandments, and the fulfilling of the law.
7. In virtue and efficacy; because by this alone God reigns in the heart of man, and man is united to God.
8. In extent; leaving nothing to the creature, which it does not refer to the Creator.
9. In necessity; being absolutely indispensable.
10. In duration; being ever to be continued on earth, and never to be discontinued in heaven.

This is the first and great commandment. Whether the object of it is considered, who is the first and chief good; or the manner in which it is to be observed, which requires and engrosses the whole heart, soul, and mind, and all the strength and power of man; or its being the principle from whence all the duties, and actions of men should flow, and the end to which all are to be referred; and is not only a compendium of the duties of the first table of the decalogue, but of all others that can be thought to, and do, belong to God. This is the first command in order of nature, time, dignity, and causality; God being the first cause of all things, infinitely above all creatures, and love to him being the source, spring and cause of love to the neighbour; and it is the greatest in its object, nature, manner, and end. That this command, and these words our Lord cites, are so full and comprehensive, the Jews themselves cannot deny. A noted writer of their's (x) says,
"the root of "all the commandments" is, when a man loves God with all his soul, and cleaves unto him.
And, says (y) another,
"in this verse only, "thou shalt love the Lord thy God", &c,
, "the ten words, or decalogue, are comprehended".
(x) Aben Ezra in Exod. xxxi. 18. (y) Tzeror Hammor, fol. 138. 1.