6 What clearer evidence can there be of my faith, than that I was brought up by my grandmother, blessed woman, who came from you? I mean the celebrated Macrina who taught me the words of the blessed Gregory; which, as far as memory had preserved down to her day, she cherished herself, while she fashioned and formed me, while yet a child, upon the doctrines of piety. And when I gained the capacity of thought, my reason being matured by full age, I travelled over much sea and land, and whomsoever I found walking in the rule of godliness delivered, those I set down as fathers,] and made them my soul's guides in my journey to God.
And up to this day, by the grace of Him who has called me in His holy calling to the knowledge of Himself, I know of no doctrine opposed to the sound teaching having sunk into my heart; nor was my soul ever polluted by the ill-famed blasphemy of Arius. If I have ever received into communion any who have come from that teacher, hiding their unsoundness deep within them, or speaking words of piety, or, at any rate, not opposing what has been said by me, it is on these terms that I have admitted them; and I have not allowed my judgment concerning them to rest wholly with myself, but have followed the decisions given about them by our Fathers.
For after receiving the letter of the very blessed Father Athanasius, bishop of Alexandria, which I hold in my hand, and show to any one who asks, wherein he has distinctly declared that any one expressing a wish to come over from the heresy of the Arians and accepting the Nicene Creed, is to be received without hesitation and difficulty, citing in support of his opinion the unanimous assent of the bishops of Macedonia and of Asia; I, considering myself bound to follow the high authority of such a man and of those who made the rule, and with every desire on my own part to win the reward promised to peacemakers, did enroll in the lists of communicants all who accepted that creed.
Source: Letters (New Advent)