In the Country He Gives His Attention to Literature, and Explains the Fourth Psalm in Connection with the Happy Conversion of Alypius. He is Troubled with Toothache
12 When shall I call to mind all that took place in those holidays? Yet neither have I forgotten, nor will I be silent about the severity of Your scourge, and the amazing quickness of Your mercy. Thou at that time tortured me with toothache; and when it had become so exceeding great that I was not able to speak, it came into my heart to urge all my friends who were present to pray for me to You, the God of all manner of health. And I wrote it down on wax, and gave it to them to read. Presently, as with submissive desire we bowed our knees, that pain departed. But what pain? Or how did it depart? I confess to being much afraid, my Lord my God, seeing that from my earliest years I had not experienced such pain. And Your purposes were profoundly impressed upon me; and, rejoicing in faith, I praised Your name. And that faith suffered me not to be at rest in regard to my past sins, which were not yet forgiven me by Your baptism.
Source: Confessions (New Advent)