2 Corinthians 12:10

Wherefore I take pleasure in weakness, injuries, in necessities, in persecutions, in distresses, for Christ's sake: for when I am weak, then am I strong.

Wherefore ... This verse describes Paul's living with the thorn unremoved; and there is not a word of sickness, disease, or near-sightedness, or anything of the kind. It is "injuries, persecutions, etc." of which he speaks; and what were these but the multiplied efforts of the hardened Israel against the gospel of Christ? Nevertheless, Paul will continue, thorn and all; even with the humiliation of his noblest personal aspirations in their rejection; even in that weakness he is strong. Furthermore the testimony of nineteen centuries proves that he was correct in this.