...from the preface of the book "In The Blink Of An Eye", a film editing book (that I am reading for one of my support classes) by the film editor Walter Murch:

Igor Stravinsky loved expressing himself and wrote a good deal on interpretation. As he bore a volcano within him, he urged restraint. Those without even a the vestige of a volcano within them nodded in agreement, raised their baton, and observed restraint, while Stravinsky himself conducted his own Apollon Musagete [a ballet] as if it were Tchaikovsky. We who had read him listened and were astonished.
The Magic Lantern by Ingmar Bergman

Most of us are searching--consciously or unconsciously--for a degree of internal balance and harmony between ourselves and the outside world, and if we happen to become aware--like Stravinsky--of a volcano within us, we will compensate by urging restarint. By the same token, someone who bore a glacier within him might urge passionate abandon. The danger is, as Bergman points out, that a glacial personality in need of passionate abandon may read Stravinsky and apply restraint instead."