God is a covenant-making God. He wants to live in relationship with us. God says in Heb 8:6 that Christ is the “Mediator of a better covenant, which was established on better promises.” The New Covenant, promised explicitly in Jeremiah 31, was sealed with the blood of Christ. God wants us to live in communion with him (Father, Son, and Holy Spirit) and in community with one another. The doctrine of the Trinity says that God is one in essence and three in persons. Christians are monotheists; we only believe in one God. We know the Father through the Son, and the Spirit applies the work of the Son to our lives. The church is a Christian community, living in and according to the precepts of the New Covenant in the power of the Holy Spirit. In the New Covenant, the First Commandment still applies: “There is one God and one Mediator between God and men, the Man Christ Jesus.” God demands single-minded devotion. Take up your cross and follow him. You will be hated and persecuted, but great is your reward in heaven. Follow Christ. Serve him and no other.