“For every thing, however, God has created a sign and symbol, and established standards and tests by which it may be known. The spiritually learned must be characterized by both inward and outward perfections; they must possess a good character, an enlightened nature, a pure intent, as well as intellectual power, brilliance and discernment, intuition, discretion and foresight, temperance, reverence, and a heartfelt fear of God. For an unlit candle, however great in diameter and tall, is no better than a barren palm tree or a pile of dead wood….“

– ‘Abdu’l-Bahá, Compilation on Scholarship