For desire is a flame that has reduced to ashes uncounted lifetime harvests of the learned, a devouring fire that even the vast sea of their accumulated knowledge could never quench. How often has it happened that an individual who was graced with every attribute of humanity and wore the jewel of true understanding, nevertheless followed after his passions until his excellent qualities passed beyond moderation and he was forced into excess.
—‘Abdu’l-Bahá, The Secret of Divine Civilization
