We are slaves of what we don't know; of what we know we are masters. Whatever vice or weakness in ourselves we discover and understand its cause and workings, we overcome it by the very knowing. The primary purpose of meditation is to become more conscious and familiar with our inner life. The ultimate purpose is to reach the source of life.
There is nothing wrong with duality as long as it does not create conflict. Multiplicity and variety without strife is joy. In pure consciousness there is light. For warmth, contact is needed. Above the unity of being is the union of love. Love is the purpose of duality.
The primary purpose of meditation is to become conscious of, and familiar with, our inner life. The ultimate purpose is to reach the source of life and consciousness.