Mitchell had answered that, as far as he understood them, mystical experiences were significant only to the extent that they changed a person's conception of reality, and if that changed conception led to a change in behavior and action, a loss of ego.
For those who have experienced the joy of being alone with nature there is really little need for me to say much more; for those who have not, no words of mine can ever describe the powerful, almost mystical knowledge of beauty and eternity that come, suddenly, and all unexpected.