A New Man and Woman!
"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)
When you made Jesus Christ Lord of your life, you became what the Bible calls a "new creature." Inside, you're not the same person you were before. You have the nature of God born into you. But it's not enough for you just to have that new nature on the inside. You have to let it take over the outside as well.
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!
As you have let the new you out when you made the desicion to have WLS, you have to let the new creation inside of you out when you accept Jesus Christ.