I think that healing is misunderstood. I think that the healing we are promised is referring to sin. Christ said that those who are well dont need a physician but only those who are sick. He was talking about sin, not actually physical illness. I think that this world is full of pollution and poison that makes people sick and God never promised that we would live forever, but he promises that we will have a great reward in heaven where there will be no more sorrow, sickness or death.
Mathew 9:10 Now it happened, as Jesus sat at the table in the house, that behold, many tax collectors and sinners came and sat down with Him and His disciples. 11 And when the Pharisees saw it, they said to His disciples, “Why does your Teacher eat with tax collectors and sinners?”
12 When Jesus heard that, He said to them, “Those who are well have no need of a physician, but those who are sick. 13 But go and learn what this means: ‘I desire mercy and not sacrifice.’ For I did not come to call the righteous, but sinners, to repentance.”[c]
