"The force of kundalini.. We hear much of this strange fire and of the danger of prematurely arousing it; and much of what we hear is undoubtedly true. There is indeed most serious peril in awakening the higher aspects of this furious energy in a man before he has gained the strength to control it, before he has acquired the purity of life and thought which alone can make it safe for him to unleash potency so tremendous."
January 1, 1970
https://en.wikiquote.org/wiki/Chakras