Kybalion - The Hermetic Philosophy
Mind (as well as metals and elements) may be transmuted, from state to state; degree to degree; condition to condition; pole to pole; vibration to vibration. True Hermetic Transmutation is a Mental Art.
The Kybalion, The Hermetic Philosophy, by Three Initiates. First Published 1908. Republished 2008 by Forgotten Books, FB &c Ltd., London, 2008; ibid. pg. 20