And you shall love the Lord your God with all your heart, and with all your soul, and with all your mind, and with all your strength: this is the first commandment.
All Commentaries on Mark 12:30 Go To Mark 12
Justin Martyr
AD 165
And that we ought to worship God alone, He thus persuaded us: "The greatest commandment is, Thou shalt worship the Lord thy God, and Him only shall thou serve, with all thy heart, and with all thy strength, the Lord God that made thee."