Charles Ellicott Commentary Romans 1:25

"for that they exchanged the truth of God for a lie, and worshipped and served the creature rather than the Creator, who is blessed for ever. Amen." — Romans 1:25 (ASV)

Who changed the truth of God into a lie.—They ceased to worship God as He is—in His own true essential nature, and worshipped false gods instead. The phrase “into a lie,” is literally, with a lie, the “lie” being regarded as the instrument by which the substitution is made. By “a lie” is meant here “false gods,” who are the supreme embodiment of falsehood. (Jeremiah 13:25; Jeremiah 16:19, etc.)

The introduction of the doxology in this verse is due to an impulse of reverential feeling. Shocked at the language which he finds himself using, and at the connection in which the most Holy Name has been mentioned, the Apostle turns aside for a moment to testify to his own humble adoration.