The same wind that blew in your back on your way to hell, will blow in your face on your way to heaven. After the initial well-being, saved and accepted in the family of Christ, you find yourself assailed by thoughts and forces you thought were no longer part of your life.
This can throw you, because you’re not yet grounded in God’s word. You’re discovering that your new birth didn’t do away with your old nature, it just brought it into sharp contrast. Listen to Paul, “What I am doing, I do not understand. For what I will to do, that I do not practice; but what I hate, that I do. If, then, I do what I will not to do, I agree with the law that it is good. But now, it is no longer I who do it, but sin that dwells in me. For I know that in me (that is, in my flesh) nothing good dwells; for to will is present with me, but how to perform what is good I do not find. For the good that I will to do, I do not do; but the evil I will not to do that I practice. Now if I do what I will not to do, it is no longer I who do it, but sin that dwells in me. I find then a law, that evil is present with me, the one who wills to do good. Sound familiar?
When Rebekah the wife of Isaac prayed, God answered and she conceived twin boys, Jacob and Esau. But they struggled with one another in her womb causing her distress. So she enquired of the Lord, “Why … am I his way? Genesis 25:22. God answered, “Two nations are in your womb … one people shall be stronger than the other; and the older shall serve the younger.” Genesis 25:23.
There’s a lesson here for you; even though God has redeemed you and made you his child, you still have two natures within you wrestling for control. What’s the answer? The oldest (your flesh) must submit to the youngest (your new nature). Who will win? The one you feed, protect and develop most.