As some men, by God’s Grace, after long and careful deliberations and analysis can have pity on the mentally disabled among them, not by healing them (for they lack the ability to do so), but by pardoning their evil deeds and attempt to offer whatever known medical treatment that can be afforded, God has chosen to do ever much more. He has promised to heal mankind of their erring ways:
Isaiah 57:17-18, “Because of his sinful greed I was angry, so I struck him; I was angry and hid; but he went on turning back to the desires of his heart. I have seen his ways, but I will heal him; I will lead him and restore comfort to him and his mourners”
God did just that. God heals mankind with the blood of his Son: “But He was wounded for our transgressions, He was bruised for our iniquities; the chastisement for our peace was upon Him, and by His stripes we are healed.” Isaiah 53:5
If you have a healed person, not believing that he is healed by Christ, and still going after the deeds of his previously sickening condition, you can compare the world to the state of that person: Healed by Christ, but not aware of its healed condition.”
What can be done: Assure the world of the healing of Christ by sharing with them how Christ has healed you, your testimony of His Salvation.
“Now all these things are from God, who reconciled us to Himself through Christ and gave us the ministry of reconciliation, namely, that God was in Christ reconciling the world to Himself, not counting their trespasses against them, and He has committed to us the word of reconciliation. Therefore, we are ambassadors for Christ, as though God were making an appeal through us; we beg you on behalf of Christ, be reconciled to God. (2 Corinthians 5:18-20)
Jesus is the well of the living water, the Holy Spirit. 