Manjusri is a Bodhisattva of wisdom. How does He assist Sakyamuni Buddha? He wields a sword in one hand to cut down evil demon and cut off ego. Evil thoughts or ideas are called demon by the Buddha. Manjusri Bodhisattva holds a scripture of sutra in another hand. What is the function of a sutra? To assist Sakyamuni Buddha to spread Buddhism and develop the cause. This is noble.