The essence of beauty, the origin of beauty, is a reason for being.
Yūgen (幽玄) is an important concept in traditional Japanese aesthetics. The exact translation of the word depends on the context. In the Chinese philosophical texts the term was taken from, yūgen meant “dim”, “deep” or “mysterious”. In the criticism of Japanese waka poetry, it was used to describe the subtle profundity of things that are only vaguely suggested by the poems.
Yūgen is said to mean “a profound, mysterious sense of the beauty of the universe… and the sad beauty of human suffering”.
Yūgen suggests that beyond what can be said but is not an allusion to another world. It is about this world, this experience. (Wikipedia)