Eternal Wisdom: The Esoteric Gnosis of Perennial Philosophy
Gwendolyn Taunton
A Companion to the Philosophy of Science
W. Newton-Smith
An Imaginary Tale: The Story of [The Square Root of Minus One]
Paul J. Nahin
Merriam-Webster's Dictionary of Quotations
Merriam-Webster
Collected Works of C.G. Jung, Volume 15: Spirit in Man, Art, ...
C. G. Jung
Theosophy: An Introduction to the Spiritual Processes in Human ...
Rudolf Steiner