The theme of the world is justice or mishpat, and the theme of existence is based on mishpat. Hanhagas hayichud is very mysterious and few people are aware of what it really is. It is the hidden hanhaga, an understanding kept above what we are allowed to know. How does G-d act with the world based on His Yichud, not on his Mishpat? Mishpat is based on effort and on earning what you have, for the good or the bad. Yichud is based on a different objective process. What is its function and how does it do it?