But I have surely written you that I am at work on a large composition. You cannot believe how this claims one's entire being, and how one is often so deep in it that for the outer world one is as if dead. Try to conceive a work so vast that in it the entire world is mirrored--one is, so to speak, only an instrument on which the whole universe plays. (I have explained this to you often, and you must accept it, if you really wish to understand me. Everyone who wishes to live with me must learn this. In such moments I no longer belong to myself.) ...These are fearful birth pains the creator of such a work suffers, and before all this organizes itself, builds itself up, and ferments in his brain, it must be preceded by much preoccupation, engrossment with self, a being dead to the outer world. My symphony will be something the world has not as yet heard! --Gustav Mahler, in a letter to his lover Anna von Mildenburg, describing the gestation of his Third Symphony--and responding to her...
"The study of the history of music and the hearing of masterworks of different epochs will speediest of all cure you of vanity and self-adoration."