It is a good rule never to see or talk to the man whose words have wrung your heart, or helped it, just as it is wise not to look down too closely at the luminous glow which sometimes shines on your path on a summer night, if you would not see the ugly worm below.
The true nature of soul is right knowledge, right faith and right conduct. The soul, so long as it is subject to transmigration, is undergoing evolution and involution.