... chanted seed-sounds discharged by the mental gun of concentration. The PURANAS (ancient SHASTRAS or treatises) describe these MANTRIC wars between DEVAS and ASURAS (gods and demons). An ASURA once tried to slay a DEVA with a potent chant. But due to mispronunciation the mental bomb acted as a boomerang ... — Autobiography of a YOGI • Paramhansa Yogananda
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