What truth about the old Adamic nature do people need to be convinced of?
People must be convinced that their old Adamic nature is a natural-born rebel against the things of God. Because that nature remains under the control of the old Adam, the carnal mind is enmity, making the person an enemy of God even while claiming to love and believe in Him.
The passage explains that the carnal mind belongs to anyone still under the control of the old Adam, someone who has never had the power of the gospel operate in their life. That mind is enmity. People may insist they do not hate God, that they love God and believe in Him and are not His enemy, but the book says they are, and the book does not lie. Their old Adamic nature is still a rebel. If a person is a rebel, he is an enemy. Les teaches that this is the truth people must be convinced of: the old Adamic nature is a natural-born rebel against the things of God.