In the great beginning, there was non-being. It had neither being nor name. The One originates from it; it has oneness but not yet physical form. When things obtain it and come into existence, that is called virtue (which gives them their individual character). That which is formless is divided [into yin and yang], and from the very beginning going on without interruption is called destiny (ming, fate). Through movement and rest it produces all things. When things are produced in accordance with the principle (li) of life, there is physical form.

(Tchuang Tzu)