Evelyn Underhill
Practical Mysticism. A Little Book for Normal People.1914
To elude nature, to refuse her friendship, and attempt to leap the river of life in the hope of finding God on the other side, is the common error of a perverted mysticality. It is as fatal in result as the opposite error of deliberately arrested development, which, being attuned to the wonderful rhythms of natural life, is content with this increase of sensibility; and, becoming a “nature-mystic,” asks no more.
Reference
Practical Mysticism. A Little Book for Normal People (1914); reprint 1942 (ISBN 0-7661-0141-X); reprinted by Vintage Books, New York 2003 [with Abba (1940)]: ISBN 0-375-72570-9; see text at Wikisource.