I cannot recall the recent context when this came up, but here is that quote from Confessions of St. Augustine:
To Thee be praise, glory to Thee, Fountain of mercies. I was becoming more miserable, and Thou nearer. Thy right hand was continually ready to pluck me out of the mire, and to wash me thoroughly, and I knew it not; nor did anything call me back from a yet deeper gulf of carnal pleasures, but the fear of death, and of Thy judgment to come; which amid all my changes, never departed from my breast. And in my disputes with my friends Alypius and Nebridius of the nature of good and evil, I held that Epicurus had in my mind won the palm, had I not believed that after death there remained a life for the soul, and places of requital according to men's deserts, which Epicurus would not believe. And I asked, “were we immortal, and to live in perpetual bodily pleasure, without fear of losing it, why should we not be happy, or what else should we seek?” not knowing that great misery was involved in this very thing, that, being thus sunk and blinded, I could not discern that light of excellence and beauty, to be embraced for its own sake, which the eye of flesh cannot see, and is seen by the inner man. Nor did I, unhappy, consider from what source it sprung, that even on these things, foul as they were, I with pleasure discoursed with my friends, nor could I, even according to the notions I then had of happiness, be happy without friends, amid what abundance soever of carnal pleasures. And yet these friends I loved for themselves only, and I felt that I was beloved of them again for myself only.
O crooked paths! Woe to the audacious soul, which hoped, by forsaking Thee, to gain some better thing! Turned it hath, and turned again, upon back, sides, and belly, yet all was painful; and Thou alone rest. And behold, Thou art at hand, and deliverest us from our wretched wanderings, and placest us in Thy way, and dost comfort us, and say, “Run; I will carry you; yea I will bring you through; there also will I carry you.”