The energy-source of the self

"All men know that beauty and ugliness are correlatives, as are skill and clumsiness; one implies and suggests the other. So also existence and non-existence pose the one the other; so also is it with ease and difficulty, length and shortness; height and lowness. Also Musick exists through harmony of opposites; time and space depend upon contraposition. By the use of this method, the sage can fulfil his will without action, and utter his word without speech. All things arise without diffidence; they grow, and none interferes; they change according to their natural order, without lust of result. The work is accomplished; yet continueth in its orbit, without goal. This work is done unconsciously; this is why its energy is indefatigable."