A symphonic conductor should reconcile himself to the realization that, regardless of his approach or temperament, the eventual result is the same — the orchestra will hate him.
Source, in full
In "Music in Aspic," Harper's Magazine (October 1939), an abbreviated chapter from his soon-to-be-published A Smattering of Ignorance (1940); reproduced in Gentlemen, Scholars, and Scoundrels: A Treasury of the Best of Harper's Magazine from 1850 to the Present (1959), edited by Harry Knowles, p. 246