Rom 1:25 …who exchanged the truth of God for the lie

The text does not say “a” lie but “the” lie.
What is “the lie”?
I can only think of one and it stems from the first lie, which is two-fold.
Gen 3:4, 5 – Then the serpent said to the woman, “You will not surely die. For God knows that in the day you eat of it your eyes will be opened, and you will be like God, knowing good and evil.”
The lie is one that still exists today – you will not die [by disobeying God] and you will be like God, knowing good and evil.
So many believe there is no accountability for sin. Some believe sin is an irrelevant, antiquated term no longer applicable today, which is the lie.
There is a belief you are in control of your destiny – be like God.
Again, the lie.
If we are like God, the Creator, then each of us can “create” our own god, that is, worship and serve the creature rather than the Creator. (Rom 1:25)
Do not fall victim to the lie but read and believe the truth found in God’s word.