The first commandment is God's claim to have the absolute place in the heart and life (Exd 20:3). Jehovah will not share with another. Christ repeats this same truth when Satan would have Him to worship himself (Mat 4:10). The following Scriptures where the word "only" occurs will illustrate the absoluteness of God's claim:
1. Saved by the Lord only (2Ki 19:19; Isa 37:20).
2. Separated only unto the Lord (1Sa 7:3-4).
3. Sacrificing only to the Lord (Exd 22:20).
4. Serving only the Lord (Mat 4:10).
5. Speaking only the word of the Lord (Num 22:35).
6. Seeing only the Lord (Mat 17:8).
7. Singing only of the Lord (Rom 16:27).