Thusness, or suchness, is the only term which can be used to express the ultimate indefinable, the unnamable reality. It is otherwise called the Matrix of Thus-come. Thus-come is Buddha-nature hidden in ordinary human nature. ‘Thus-come’ is a designation of the Buddha employed by himself instead of ‘I’ or ‘we,’ but not without special meaning. …

Now, Thusness or the Matrix of Thus-come or Thus-gone means the true state of all things in the universe, the source of an Enlightened One, the basis of enlightenment. When static, it is Enlightenment itself (with no relation to time or space); but when dynamic, it is in human form assuming an ordinary way and feature of life. Thusness and the Matrix of Thus-come are practically one and the same—the ultimate truth. In Mahayana the ultimate truth is called Suchness or Thusness. …

Thusness in its static sense is spaceless, timeless, all equal, without beginning or end, formless, colorless, because the thing itself without its manifestation cannot be sensed or described. Thusness in its dynamic sense can assume any form; when driven by a pure cause it takes a lofty form; when driven by a tainted cause it takes a depraved form. Thusness, therefore, is of two states. The one is the Thusness itself; the other is its manifestation, its state of life and death.

There are therefore three series of causations to be considered: (a) Causation by Action-influence as depicted in the Wheel of Life;
(b) To explain the origin of action, Causation by Ideation-store; (c) To explain the origin of the ideation-store, Causation by Thusness. The ideation-store of a human being is determined by his nature as a human being and this nature is a particular dynamic form of Thusness. One should not ask where Thusness or the Matrix of Thus-come originates, because it is the noumenon, the ultimate indescribable Thusness.