Who is the God of the old nature and what is it bent toward?
The God of the old nature is Satan, the God of this world. That old nature is bent toward rebellion and unbelief, set against the new nature and the Holy Spirit. It cannot agree with God's righteousness, holiness, or laws, producing constant warfare in the believer until death or Rapture.
Les teaches that the old nature, also called the old Adam or the flesh, has Satan as its God, the God of this world. It is bent in rebellion and bent in unbelief. The new nature, by contrast, has a whole new set of values in compliance with the righteousness, holiness, and laws of God. These two forces are contrary and cannot agree on anything, so they war constantly within the believer. The battle lines are defined from salvation until death or the Rapture, making it a constant warfare.