Evelyn Underhill (December 6, 1875 to June 15, 1941) fits this category. The author of numerous volumes on mysticism, including the very popular (at one time) Mysticism: A Study of the Nature and Development of Man's Spiritual Consciousness,(1911) Underhill exemplified that about which she wrote, even if we cannot say she appreciated certain boundaries.
Here are other of her titles in the public domain, some of which use a fictional format:
The Grey World (1904)
The miracles of Our Lady Saint Mary: brought out of divers tongues (1906)
The Lost Word (1907)
The Column of Dust (1909)
Immanence: A Book of Verses (1913)
Practical mysticism: a little book for normal people (1914)
Theophanies: A Book of Verses (1916)
Jacopone Da Todi, Poet and Mystic--1228-1306: A Spiritual Biography(1919)
The Life of the Spirit and the Life of Today (1922)
Her letters (The letters of Evelyn Underhill, edited by Charles Williams (1943)), mention the names of several of her cats; Jacob, a Persian tabby is one. And there were cats without names (or proper citations):
Look with the eye of contemplation on the most dissipated tabby of the streets, and you shall discern the celestial quality of life set like an aureole about his tattered ears...