The word "mysticism" is popularly used in a variety of loose and inaccurate ways. Sometimes anything is called "mystical" which is misty, foggy, vague, or sloppy. It is absurd that "mysticism" should be associated with what is "misty" because of the similar sound of the words. And there is nothing misty, foggy, vague, or sloppy about mysticism.
The Teachings of the Mystics (1960), p. 10