Richard Wagner in Bayreuth by Friedrich Nietzsche

It is quite impossible otherwise: the observer who is confronted with a nature such as Wagner's must, willy-nilly, turn his eyes from time to time upon himself, upon his insignificance and frailty, and ask himself, What concern is this of thine? Why, pray, art thou there at all? Maybe he will find no answer to these questions, in which case he will remain estranged and confounded, face to face with his own personality.

Let it then suffice him that he has experienced this feeling; let the fact that he has felt strange and embarrassed in the presence of his own soul be the answer to his question For it is precisely by virtue of this feeling that he shows the most powerful manifestation of life in Wagner -- the very kernel of his strength -- that demoniacal magnetism and gift of imparting oneself to others, which is peculiar to his nature, and by which it not only conveys itself to other beings, but also absorbs other beings into itself; thus attaining to its greatness by giving and by taking. As the observer is apparently subject to Wagner's exuberant and prodigally generous nature, he partakes of its strength, and thereby becomes formidable through him and to him. And every one who critically examines himself knows that a certain mysterious antagonism is necessary to the process of mutual study. Should his art lead us to experience all that falls to the lot of a soul engaged upon a journey, i.e.