St. Jerome (347 - † 420) recounts:
Many years ago, when for the kingdom of heaven's sake I had cut myself off from home, parents, sister, relations, and — harder still — from the dainty food to which I had been accustomed; and when I was on my way to Jerusalem to wage my warfare, I still could not bring myself to forego the library which I had formed for myself at Rome with great care and toil. And so, miserable man that I was, I would fast only that I might afterwards read Cicero. After many nights spent in vigil, after floods of tears called from my inmost heart, after the recollection of my past sins, I would once more take up Plautus. And when at times I returned to my right mind, and began to read the prophets, their style seemed rude and repellent. I failed to see the light with my blinded eyes; but I attributed the fault not to them, but to the sun. While the old serpent was thus making me his plaything, about the middle of Lent a deep-seated fever fell upon my weakened body, and while it destroyed my rest completely — the story seems hardly credible — it so wasted my unhappy frame that scarcely anything was left of me but skin and bone.
Meantime preparations for my funeral went on; my body grew gradually colder, and the warmth of life lingered only in my throbbing breast. Suddenly I was caught up in the spirit and dragged before the judgment seat of the Judge; and here the light was so bright, and those who stood around were so radiant, that I cast myself upon the ground and did not dare to look up. Asked who and what I was I replied: I am a Christian. But He who presided said: You lie. You are a follower of Cicero and not of Christ. For "where your treasure is, there will your heart be also." (Matthew 6:21) Instantly I became dumb, and amid the strokes of the lash — for He had ordered me to be scourged — I was tortured more severely still by the fire of conscience, considering with myself that verse, In the grave who shall give you thanks?
Yet for all that I began to cry and to bewail myself, saying: Have mercy upon me, O Lord: have mercy upon me. Amid the sound of the scourges this cry still made itself heard. At last the bystanders, falling down before the knees of Him who presided, prayed that He would have pity on my youth, and that He would give me space to repent of my error. He might still, they urged, inflict torture on me, should I ever again read the works of the Gentiles. Under the stress of that awful moment I should have been ready to make even still larger promises than these. Accordingly I made oath and called upon His name, saying: Lord, if ever again I possess worldly books, or if ever again I read such, I have denied You. Dismissed, then, on taking this oath, I returned to the upper world (after the vision ended), and, to the surprise of all, I opened upon them eyes so drenched with tears that my distress served to convince even the incredulous...I profess that my shoulders were black and blue, that I felt the bruises long after I awoke from my sleep, and that thenceforth I read the books of God with a zeal greater than I had previously given to the books of men.
(Cf. ST. JEROME, Epistole 22,30, in PL 22, 416-417)