The Sin Nature is the center of the soul's rebellion against God. In the Bible, human good is contrasted with divine good which is the work produced by the Spirit of God in the life of a believer who is walking in daily fellowship with the Lord under the control of the Holy Spirit. The Sin Nature has patterns of lusts, or desires, the basic motivators of all the activities of human life. The basic drives include the desire for power, approbation, ego satisfaction, sexual satisfaction, material satisfaction, and so forth. The Sin Nature has a system of trends, or inclinations, which vary among individuals.
Some people have an inclination toward immorality or lasciviousness.
Others have trends toward morality or asceticism. Either trend is a product of Sin Nature activity. The trends of the old sin nature are derived from the individual lust pattern. There are certain areas in which we lust, and other areas where we do not. The trends of the old sin nature are classified in two categories, legalism and lasciviousness.