Thou shalt love the Lord thy God; κυ ìριον το Ìν Θεο ìν σου. Christ enunciates the two great moral precepts of God's Law, not, indeed, stated in these words in the Decalogue, but implied throughout, and forming the basis of true religion.
Heart … soul … mind. The Septuagint has "mind, soul, strength." The expressions mean generally that God is to be loved with all our powers and faculties, and that nothing is to be preferred to him. It is difficult to define with any precision the signification of each term used, and much unprofitable labour has been expended in the endeavour to limit their exact sense.
"Quum," as Grotius says, "vocum multarum cumulatio nihil quam intensius studium designet." It is usual to explain thus: Heart; which among the Hebrews was considered to be the seat of the understanding, is here considered as the home of the affections and the seat of the will.
Soul; the living powers, the animal life. Mind; διαμοι ìᾳ, intellectual powers. These are to be the seat and abode of the love enjoined.