The Only True God
But the LORD is the true God;
he is the living God, the eternal King. --Jeremiah 10:10
This OT confession by Jeremiah is similar to the one Paul utters in 1 Timothy 2:3-5:
"This is good, and pleases God our Savior, who wants all men to be saved and to come to a knowledge of the truth. For there is one God and one mediator between God and men, the man Christ Jesus."