I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service.
– Romans 12:1
Don't expect that to happen automatically. You have to make a decision to bring your body into obedience to the new man within you. You must determine to do what Romans 6:12 says and "let not sin...reign in your mortal body."
I know that sounds tough, but remember, you're not in this alone. You have a Helper inside you to enable you to carry out that decision. His name is the Holy Spirit. He's there to strengthen you. He gives you the power to put sin out of your life and under your feet.
Make that decisive dedication of your body today--and let that new man that's on the inside of you begin to come out! @KCM