Why doesn't God cure my illness?
Ever since Adam and Eve fell, mankind has been relentlessly hounded by all manner of ill health. Because sin caused everything to become corrupt, there is nothing extraordinary about people coming down with infirmities. One of the reasons God cursed the earth was to remind us of our fallen spiritual condition.
Anyone who takes an inventory of the medical history of his or her own friends and family will quickly realize that illness is a very common occurrence. When we're born, we may be the picture of perfect health, but as we get older, our health generally declines. Because there is no lasting cure for any illness in this world, the cleansing of our souls from sin should be our greater priority.
God could very easily cure any disease, but there is always some other ailment to take its place. You would have to inquire of God, himself to find out why He doesn't heal someone of an illness. If we trust in the Lord, He will work all things out for good.
"For we know that all things work together for good to them that love God, to them who are called according to His purpose" (Romans 8:28).