Zhu Xi discussed how he saw the Supreme Ultimate concept to be compatible with principle of Taoism, but his concept of "Taiji" was different from the understanding of "Tao" in Daoism. Where "Taiji" is a differentiating principle that results in the emergence of something new, "Dao" is still and silent, operating to reduce all things to equality and indistinguishability. He argued that there is a central harmony that is not static or empty but was dynamic, and that the Supreme Ultimate is itself in constant creative activity.