I saw myself, Taran answered. In the time I watched, I saw strength – and frailty. Pride and vanity, courage and fear. Of wisdom, a little. Of folly, much. Of intentions, many good ones; but many more left undone. In this, alas, I saw myself a man like any other.
But this, too, I saw, he went on. Alike as men may seem, each is different as flakes of snow, no two the same. You told me you had no need to seek the Mirror, knowing you were Annlaw Clay-Shaper. Now I know who I am: myself and none other. I am Taran.

Chapter 21 - The Chronicles of Prydain (1964–1968) - Book IV: Taran Wanderer (1967)