2 Corinthians 12:9

⁶For though I would desire to glory, I shall not be a fool; for I will say the truth: but now I forbear, lest any man should think of me above that which he seeth me to be, or that he heareth of me. ⁷And lest I should be exalted above measure through the abundance of the revelations, there was given to me a thorn in the flesh, the messenger of Satan to buffet me, lest I should be exalted above measure. ⁸For this thing I besought the Lord thrice, that it might depart from me. ⁹And he said unto me, My grace is sufficient for thee: for my strength is made perfect in weakness. Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me. ¹⁰Therefore I take pleasure in infirmities, in reproaches, in necessities, in persecutions, in distresses for Christ’s sake: for when I am weak, then am I strong. ¹¹I am become a fool in glorying; ye have compelled me: for I ought to have been commended of you: for in nothing am I behind the very chiefest apostles, though I be nothing. ¹²Truly the signs of an apostle were wrought among you in all patience, in signs, and wonders, and mighty deeds.

Paul’s most personal letter, about suffering, weakness and God’s comfort.