2 Corinthians 12

Moroni taught the words of the Lord -

"...if men come unto me I will show unto them their weakness. I give unto men weakness that they may be humble; and my grace is sufficient for all men that humble themselves before me; for if they humble themselves before me, and have faith in me, then will I make weak things become strong unto them." (Book of Mormon | Ether 12:27)

Paul taught this same doctrine concerning himself describing -

"...yet of myself I will not glory, but in mine infirmities.
6 For 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.
7 And 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. (New Testament | 2 Corinthians 12:5 - 7)

I'm sure there has been a great deal of speculation what this "thorn in the flesh" was, but Paul doesn't revealt that. Only that -

"For this thing I besought the Lord thrice, that it might depart from me.
9 And 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." (New Testament | 2 Corinthians 12:8 - 9)

Paul may not necessarily understood why this particular affliction, but he did understand and had faith in the Lord that it was for his good. Then, just as Moroni, he declares -

"Therefore 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." (New Testament | 2 Corinthians 12:10)

This humility is even reflected in his Church calling -

"I 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." (New Testament | 2 Corinthians 12:11)