We must understand from the beginning is that it is God’s will for us to be healed.
In Luke 19:10, Jesus said, "For the Son of Man came to seek and to save that which was lost." Interestingly, the word "save" is taken from the Greek root word "sozo," which means “to make whole—spirit, soul and body.” In other words, physical healing is like salvation for our body. In addition to believing that God is doing a good work in our spirit and soul, we can also trust Him to do a good work in our body.
There are several Biblical reasons for believing that healing is for all, and not just the “lucky few” that are currently experiencing divine healing. God shows no partiality. Though this doctrine contradicts the idea that God is partial to some for no reason except his own sovereign pleasure, it is nevertheless here in the scripture that God shows no partiality, or as the King James version puts it – "God is no respecter of persons." If God planned healing for some but slow painful death by chronic sickness for others, He would be a respecter of persons – he would be showing partiality. But this was not his plan for anybody. If it happens, it is not God’s fault. God has made promises to heal. Let us get hold of them and help others to do so.
(Acts 10:34I Peter 2:24; 3rd John 2; Psalm 103:3; Matthew 8:17; Luke 13:10-17)