The folding of mind is to take mind as the foundation. For Chih-i,
contemplating mind is to regard “the mind as the foundation for all dharmas” (Hsin-shih Chu-fa Chih-pen). This is because it is the mind in activity that generates karman (deeds), from which suffering arises. It is also the mind that embraces all dharmas or entities. In Chih-i’s system, the Ten Suchnesses and the Ten Dharma-realms represent all entities. Since the Ten Dharma-realms are the representation of the whole universe and they are embraced by the mind, mind can be taken as the universe. (Vol. 2, Page 31)