I have epilepsy. There is no medical cure for mine. I have prayed for God to cure it. Hundreds of people have prayed for God to cure it. I have been anointed and prayed for by the elders of my church. Still I carry my thorn. When I am weakest, God always returns me to these verses.
2 Corinthians 12:8 Three times I pleaded with the Lord about this, that it should leave me. 9 But he said to me, "My grace is sufficient for you, for my power is made perfect in weakness." Therefore I will boast all the more gladly of my weaknesses, so that the power of Christ may rest upon me. 10 For the sake of Christ, then, I am content with weaknesses, insults, hardships, persecutions, and calamities. For when I am weak, then I am strong.
In my weakness, God provides a medication that allows me to live seizure free for a period of time. Then the seizures return, and God reminds me that when I am weakest, with Him, I am strongest. A new medication is found, and the seizures are gone. You see, God doesn't want to heal me. He just wants me to be faithful.