20 Having then laid down these principles, which, as I think, are so just that I ought to win this cause before you, let who will be my adversary, I will set forth to you, as I am able, what way I followed, when I was searching after true religion in that spirit, in which I have now set forth that it ought to be sought. For upon leaving you and crossing the sea, now delaying and hesitating, what I ought to hold, what to let go; which delay rose upon me every day the more, from the time that I was a hearer of that man, whose coming was promised to us, as you know, as if from heaven, to explain all things which moved us, and found him, with the exception of a certain eloquence, such as the rest; being now settled in Italy, I reasoned and deliberated greatly with myself, not whether I should continue in that sect, into which I was sorry that I had fallen, but in what way I was to find the truth, my sighs through love of which are known to no one better than to yourself.
Often it seemed to me that it could not be found, and huge waves of my thoughts would roll toward deciding in favor of the Academics. Often again, with what power I had, looking into the human soul, with so much life, with so much intelligence, with so much clearness, I thought that the truth lay not hid, save that in it the way of search lay hid, and that this same way must be taken from some divine authority. It remained to enquire what was that authority, where in so great dissensions each promised that he would deliver it.
Thus there met me a wood, out of which there was no way, which I was very loath to be involved in: and amid these things, without any rest, my mind was agitated through desire of finding the truth. However, I continued to unsew myself more and more from those whom now I had proposed to leave. But there remained nothing else, in so great dangers, than with words full of tears and sorrow to entreat the Divine Providence to help me. And this I was content to do: and now certain disputations of the Bishop of Milan had almost moved me to desire, not without some hope, to enquire into many things concerning the Old Testament itself, which, as you know, we used to view as accursed, having been ill commended to us.
And I had decided to be a Catechumen in the Church, unto which I had been delivered by my parents, until such time as I should either find what I wished, or should persuade myself that it needed not to be sought. Therefore had there been one who could teach me, he would find me at a very critical moment most fervently disposed and very apt to learn. If you see that you too have been long affected in this way, therefore, and with a like care for your soul, and if now you seem to yourself to have been tossed to and fro enough, and wish to put an end to labors of this kind, follow the pathway of Catholic teaching, which has flowed down from Christ Himself through the Apostles even unto us, and will hereafter flow down to posterity.
Source: On the Profit of Believing (New Advent)