Ante-Nicene Fathers, Vol VIII:
Pseudo-Clementine Literature.: Chapter II

Chapter II.—Good Out of Evil.

As I pondered without ceasing these and such like questions—I know not whence arising—I had such bitter grief, that, becoming pale, I wasted away; and, what was most terrible, if at any time I wished to drive away this meditation as unprofitable, my suffering became all the more severe; and I grieved over this, not knowing that I had a fair inmate, even my thought, which was to be to me the cause of a blessed immortality, as I afterwards knew by experience, and gave thanks to God, the Lord of all.  For it was by this thought, which at first afflicted me, that I was compelled to come to the search and the finding of things; and then I pitied those whom at first, through ignorance, I ventured to call blessed.