I cannot classify it, but I call it Tao. Powerful, it creates all things, is present in all things, returns all things to their origin. The Tao is great. Heaven is great. Earth is great. Humanity is great. These are the four great things. Humanity follows Earth. Earth follows Heaven. Heaven follows Tao. Tao follows its own nature. The Tao is like an overflowing river. It rises to the left and to the right.The ten thousand things arise from it, but do not depart from it. The Tao acts, but cannot be defined. It clothes and nourishes all beings, but does not rule over them. It endures without desire and without seeming "big." The ten thousand things find their home in it, and yet it does not exercise lordship over them. The Tao is very great, but it does not show its greatness. Therefore, it is truly great. Tao gives birth to the ten thousand things. Te nurtures them. They are formed from matter and completed by environment. Therefore, the ten thousand things honor Tao and respect Te, not in response to commandments, but just naturally. Tao gives birth to the ten thousand things, and Te nurtures, rears, develops, shelters, and protects them. But Tao and Te do not try to own or rule the ten thousand things, nor do they seek to make them dependent. This is true power.
This is from Lao Tzu- from this I judge the "ten thousand things" to be all things in the world or everything.