Sheep instead of goats. Good soil instead of rock. Believers instead of unbelievers. We need to be reborn, regenerated not rehabilitated. You can't rehab the old Adam, no matter how many 12-step programs you march him through.
Flesh gives birth to flesh.
But the Spirit gives birth to spirit. We need a new, spiritual, heavenly birth. Birth isn't some decision or choice on our part. That's how little we have to do with our second birth of water and Spirit. Being born is something that happens to you.