What is meant by the doctrine of “healing in the atonement” [ healing was a very important part of Jesus’ ministry The healing of atonement is a very important doctrine that has been undervalued in today 's church. Many people are prone to excusing the lack of healing miracle to the opinion that the time of miracles is over, however it is the lack of faith and the obsession with the world that has caused The Lord not to perform the healing miracles that he once did. “I understand the difficulty people have with healing in the atonement. The assumption is that if Jesus took our infirmities then sickness should obviously disappear. Well, Jesus also "bore our sins in his body on the tree, so that we might die to sins and live for righteousness; by his wounds you have been healed" (1 Pet 2:24).
Jesus accomplished two important things on the cross: he bore our infirmities and also our sins. The purpose of Him bearing our sins is so that we might die to sins and live for righteousness. Does everyone in the body of Christ "live for righteousness"? We would hope so, but we know that not everyone lives out the beautiful deliverance our Lord purchased for us. The same is true of healing.
Healing is purchased along with salvation, but both need to be worked out in our lives. We don’t automatically walk in either one of them. We need to persevere by faith until both healing and righteousness is worked in us.
So to answer the question why some remain sick, I simply answer it the same…