Delivering someone from evil is not a phrase that should be thrown about loosely. You cannot deliver someone from evil if you personally are indebted to evil. If your pastor claims that he or she can deliver you from evil, from demonic possession, or from illness, first look at their heart to ensure that they are filled with the indwelling Holy Spirit Of God. If they are, their heart should be full of light. Next, look at their back. It too should be full of light on both sides, in the area of the lungs. Only then should you allow them to touch you, or to attempt to heal you.
The Lord God Almighty El Shaddai