Romans 8:5 For they that are after the flesh do mind the things of the flesh; but they that are after the Spirit the things of the Spirit.
You live by how you think! So what do you think about. If you think fleshly thoughts then you will live out fleshly desires. You actually think about who you are. When the Holy Spirit of God lives in you then you will have new desires and the ability to live them out.
He lives in you and has changed you. Live out who you are in Christ. You have victory over sin through Christ who lives in you.