Self-forgetting is inherent in self-knowing. Consciousness and unconsciousness are two aspects of one life. They co-exist. To know the world you forget the self - to know the self you forget the world. What is world after all? A collection of memories. Cling to one thing that matters, hold on to 'I am' and let go all else. This is sadhana. In realization there is nothing to hold on to and nothing to forget. Everything is known, nothing is remembered.