“Mysticism: to dwell on the unseen, to withdraw ourselves from the things of sense into communion with God — to endeavour to partake of the Divine nature; that is, of Holiness.”

Source: Dictionary of Burning Words of Brilliant Writers (1895), P. 609.

"The Holy Dimension", p. 331
Moral Grandeur and Spiritual Audacity: Essays (1997)
Context: Faith is an awareness of divine mutuality and companionship, a form of communion between God and man. It is not a psychical quality, something that exists in the mind only, but a force from the beyond.

God's New Testament Economy, of Witness Lee - By Living Stream Ministry, ISBN 978-0-87083-199-7

Source: Evolution and Theology (1900), p. 18.

For My Legionaries: The Iron Guard (1936), Religion

Source: Flatland: A Romance of Many Dimensions (1884), PART II: OTHER WORLDS, Chapter 14. How I Vainly Tried to Explain the Nature of Flatland

XV. Why we give worship to the Gods when they need nothing.
On the Gods and the Cosmos
Context: The divine itself is without needs, and the worship is paid for our own benefit. The providence of the Gods reaches everywhere and needs only some congruity for its reception. All congruity comes about by representation and likeness; for which reason the temples are made in representation of heaven, the altar of earth, the images of life (that is why they are made like living things), the prayers of the element of though, the mystic letters of the unspeakable celestial forces, the herbs and stones of matter, and the sacrificial animals of the irrational life in us.
From all these things the Gods gain nothing; what gain could there be to God? It is we who gain some communion with them.

Introduction
On the Kabbalah and Its Symbolism (1960)
Context: The Kabbalah, literally 'tradition,' that is, the tradition of things divine, is the sum of Jewish mysticism. It has had a long history and for centuries has exerted a profound influence on those among the Jewish people who were eager to gain a deeper understanding of the traditional forms and conceptions of Judaism. The literary production of the Kabbalists, more intensive in certain periods than in others, has been stored up in an impressive number of books, many of them dating back to the late Middle Ages. For many centuries the chief literary work of this movement, the Zohar, or 'Book of Splendor,' was widely revered as a sacred text of unquestionable value, and in certain Jewish communities it enjoys such esteem to this day.

§ 28
On Spiritual Knowledge and Discrimination (480 AD)