Nick it is not the illness but the NOT HEALING that was the thorn in Paul's flesh. Just put yourself in Paul's sandles... Everywhere you go God heals people when you touch them or pry for them. Then you get to a good man and companion in the faith and you have to leave him ill. But you ask God three times to heal him and take this experience away from you.... Then God says... My grace is sufficient..... Paul was given this "thorn" that HE should not be exalted above measure..... Paul was humble enough, but the people that he served might have started to think to highly of Paul... So God showed them there is weakness in Paul, but God's strength was made perfect in weakness.....
This little lesson is of coarse again PROVEN in the salvation of Christ.... When we are DEAD, only then God's PERFECTION is alive in us... That means, when the OLD COBUS is dead, God makes Christ alive in Cobus....
God's strength is made perfect, when the old has PASSED!
About the mystery.... Who is the LIFE in all who are made alive in REBIRTH? Christ or Cobus.... Cobus is DEAD, only... ONLY Christ is the NEW CREATURE. God said it so clear.... For those IN CHRIST is a NEW CREATURE.... The NEw creature is Jesus Christ resurrected in the OLD COBUS that DIED.
Why can't people see this... when the OLD HAS PASSED... IT IS DEAD! Dead to NEVER live again! When Paul was crucified with Christ, did Paul die on the cross? They do not let a person down from a cross BEFORE HE IS DEAD.... Paul was refering to Saul. After God made PAUL His apostle, where was the old SAUL? Did the old Saul return on Tuesdays, or Sundays... or even for a minute? NOPE!!! Paul was a CEW CREATURE. And the ONLY one MOVING PAUL was the Spirit of Christ Jesus....
The SAUL spirit DIED! and will NEVER live again. The Paul God made did not have the spirit of Saul in him, he had the Spirit of GOD and Christ Jesus in Him. The life Paul lived he lived IN THE SPIRIT OF GOD. NOT in the spirit of SAUL. NEver again in the spirit of SAUL! So then who was Paul? Was he a converted Saul, or a resurrected Christ Jesus? If it was the Spirit of Christ that made Paul a holy apostle, then where is Saul? Saul would not even be MENTIONED again by God. After Paul was renamed, God NEVER refered to Saul again... Same with us. If God makes us a new creature SIN AND OLD ME IS DEAD.... GONE!!! And the NEW creature is not me, but GOD IN ME, and ME IN HIM.....