Does a Christian have two natures?
Here's the answer:
Yes, Christians do have two natures—the old nature and the new nature.
The first nature is the old nature and the second nature is the new nature. The old nature is the sinful flesh. The new nature says it is not okay to sin.
The old nature will try to convince Christians to do the wrong thing. Even Paul the Apostle struggled with his sin nature (Romans 7:20). We will all be tempted to sin because of our sin nature. However, we have been made a new creation in Christ (2 Corinthians 5:17). This means we have the power to say no to sin.
As Christians, we need to do what we can to cultivate our new nature in Christ. Our new nature says “yes” to good things and “no” to bad things. Throughout our lives, we will constantly have a battle between our old nature and our new nature. Since the Holy Spirit is in us, we can do our best to live according to our new nature, not our old sin nature.
"We know that what we used to be was nailed to the cross with him. That happened so our bodies that were ruled by sin would lose their power. So we are no longer slaves of sin" (Romans 6:6).
"If you live under the power of sin, you will die. But by the Spirit’s power you can put to death the sins you commit. Then you will live" (Romans 8:13).
"But now here are the kinds of things you must also get rid of. You must get rid of anger, rage, hate and lies. Let no dirty words come out of your mouths. Don’t lie to one another. You have gotten rid of your old way of life and its habits. You have started living a new life. Your knowledge of how that life should have the Creator’s likeness is being made new" (Colossians 3:8-10).