"a thorn in the flesh"?

The apostle Paul talks about having "a thorn in the flesh." Three times he asked the Lord to remove it, but the Lord does not. Instead the Lord says to him, "My grace is sufficient for you, for My strength is made perfect in weakness." (2 Corinthians 12:7-9)

I have wondered, I wonder still, if it is the Lord's will for my back not to be healed, if it is my "thorn in the flesh." I do not achieve much of a degree of relief. Am I to learn ... what am I to learn from this? I struggle with the pain, yet I feel I should not keep asking for prayer for relief from the pain. If this is God's will and His grace is sufficient for me, show me how to bear under the load, show me how my weakness can be strong in You. Show me how to deal with the pain and distress without looking like I am under duress. I pray this in your name. Amen.