Hear, O Israel: the Lord our God, the Lord is one! (Deuteronomy 6:4).
The apostle Paul writes to the Ephesian Church that as believers in God through Jesus Christ, we must “walk worthy of the calling with which you [we] were called, with all lowliness and gentleness, with longsuffering, bearing with one another in love, endeavoring to keep the unity of the Spirit in the bond of peace. There is one body and one Spirit, just as you were called in one hope of your calling; one Lord, one faith, one baptism; one God and Father of all, who is above all, and through all, and in you [us] all (Ephesians 4:1-6).
In this passage, Paul shows the supreme authority of the Lord Jesus Christ over our lives and that He is our one and only Master and Lord. He further explains the relationship between God the Father and the Son, beginning in Deuteronomy 6:4-5, “Hear, O Israel: the Lord our God, the Lord is one! You shall love the Lord your God with all your heart, with all your soul, and with all your strength.” Here we see the Father and the Lord Jesus are uniquely one. The testimony of the apostle John agrees with Paul that Jesus and the Father are one (John 10:30)! What an amazing revelation! There is great power and strength in knowing that we have but one Lord and God and to love Him with our whole being is all He requires of us, and He provides the ability to do it.
Why is it so vitally important that Christians know and believe that we have only one Lord? It is vital because it is the truth and because there are myriads of things vying for our affection, attention, loyalty, allegiance, worship, and devotion. This is why we must know that Jesus alone is Lord. He alone is worthy of our total focus. According to the Holy Scriptures, Jesus is the only person ever to be born of a virgin and begotten of the Holy Spirit. He is the first person to rise from the dead, the first man to enter heaven, the first man to sit on the throne of God ruling all things, visible and invisible. He is the highest-ranking individual to live on the earth because He is God’s own Son. He is the Savior of our souls, and for this reason, we call Him Lord!