 You do not have two natures. The flesh is not you. The flesh is not a part of your true identity. Yes, you still bear the responsibility of the decisions that you make in the flesh. That's true. But ultimately, that's not who you truly are if you're a born-again believer. Who you are is connected with God. In the spirit, you're one with Him. In the spirit, you already have peace. In the spirit, you already have love and power and grace and mercy and righteousness and clarity and revelation. All of those things are already yours by the Holy Spirit.