He speaks of the duality of existence.

'Nothing in the world is single.' He might have gone further, and said nothing in the universe is single.

Cold and heat, storm and sunshine, good and evil, joy and sorrow--all go in pairs.

This double life extends to all the spheres and above the spheres.

Do you understand ?" "I understand what you say," I said slowly; "but I cannot see your meaning as applied to myself or yourself." "I will teach you in a few words," went on Heliobas.