And it came to pass on a certain day, as he was teaching, that there were Pharisees and doctors of the law sitting by, which were come out of every town of Galilee, and Judaea, and Jerusalem: and the power of the Lord was present to heal them. (Luke 5 :17).

The power of healing is in the revelation of Jesus Christ. Christ manifests what he teaches. The HolySpirit manifests what He teaches. There is power in revelation. Revelation is scriptural or spiritual truth. 

Spiritual power is the ability to speak words that come to pass or to show signs and wonders. Invisible forces are behind spiritual powers. There are two power of healing:

1. Divine Power

2. Resurrection Power.

Divine power is the power of prophecies (visions). God will do nothing except He reveals it first to His servant the prophet (Amos 3:6) .  Divine power is also the power of light. Light spiritually is prophecy. The divine power is the power of the Spirit.

Resurrection power is the presence of angels. The angels were responsible for Jesus' resurrection. What has been dead can be resurrected by the powers of angels. Dead career, calling, body can all come back to life like Lazarus in John 11.  Angels loves to work in the dead part of your life, just as demons loves the graveyard or dead persons.  The resurrection power is the power of life!

You can read my post The power in the word 

Then Healing

Healing is the act of  curing the sick with powers from above. The word of God is sent forth to heal and to deliver from darkness (Psalms 107:20). Healing and deliverance are different: Healing comes to restore  your body; deliverance comes to restore your spirit. Spiritual restoration is to save you from the wrong influence or leadership.