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The Mean-In-Action
That which Heaven entrusts to man is to be called his nature. The following out of this nature is to be called the Way. The cultivation of the Way is to be called instruction in systematic truth. The Way, it may not be abandoned for a moment. If it might be abandoned, it would not be the Way. Because this is so, the man of principle holds himself restrained and keyed up in relation to the unseen world (lit. what he cannot see or hear). Since there is nothing more manifest than what is hidden, nothing more visible than what is minute, therefore the man of principle is on guard when he is alone with himself. 
(The nature in human is the soul or spirit. The Truth about this nature is Tao or Way. Tao or Spirit, inherent in each one, cannot be removed from human body. Once IT is removed, the man is dead. Meditation is to be in communion with Tao or Way, and the mind should be tied to a point and not allowed to wonder about even when alone.)[Few lines have no translation.]

That which Heaven entrusts to man is to be called his nature = Genesis 2:7 And the LORD God formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living soul. = or Surah 15 -- Al-Hijr 29. So, when I have made him and have breathed into him of My Spirit, do ye fall down, prostrating yourselves unto him. 
Our Self Nature is God or Buddha or Tao or Allah etc etc

道德經
第 三 十 二 章

道 常 無 名 。 朴 雖 小 ， 天 下 不 敢 臣 。 候 王 若 能 守 ， 萬 物 將 自 賓 。 天 地 相 合 ， 以 降 甘 露 ， 人 莫 之 令 而 自 均 。 始 制 有 名 ； 名 亦 既 有 ， 夫 亦 將 知 止 ； 知 止 所 以 不 殆 。 譬 道 之 在 天 下 ， 由 川 谷 之 於 江 海 。
Taoteching 32. The Way eternal has no name, a block of wood un-tooled, though small, may still excel the world. And if the king and nobles could retain its potency for good, then everything would freely give allegiance to their rule.
The earth and sky would then conspire to bring the sweet dew down; and evenly it would be given to folk without constraining power.
Creatures came to be with order's birth, and once they had appeared, came also knowledge of repose, and with that was security.
In this world, compare those of the Way to torrents that flow into river and sea.
(Tao is the name to signifies the Way, which is nameless. Although an unseen dot on us, It covers the world. So wise king making use of it will bring world peace. The rain will fall and the 4 seasons orderly. The Tao can be said as to go back to its source, the ocean. Tao in us are gods, Tao in ocean is like God, so we are going back to the Origin, which is no different from us as water in rain drop will merge with the water in the ocean. Where then can you find the rain drops in the ocean?)
第 三 十 七 章

道 常 無 為 而 無 不 為 。 侯 王 若 能 守 ， 萬 物 將 自 化 ； 化 而 欲 作 ， 吾 將 鎮 之 以 無 名 之 樸 ； 無 名 之 樸 ， 亦 將 不 欲 ； 不 欲 以 靜 ， 天 下 將 自 正 。
Taoteching 37. The Way is always still, at rest, and yet does everything that's done. If then the king and nobles could retain its potency for good, the creatures all would be transformed.
But if, the change once made in them, they still inclined to do their work, I should restrain them then by means of that unique Original simplicity found in the Virgin Block, which brings disinterest, with stillness in its train and so, an ordered world.
(Tao is inaction, but every things are created. So only king and government leaders can make us of it, the country can be transformed. I can restrain the human beings by meditating upon the One, so an ordered world will be in place, but I have to be in the king's position to accomplish this task.)

Application of 'wu wei' is to appoint a holy man as head-of-state. This compliments with 1st hexagram top line 'Arrogant dragon has cause for repent' which I rewrite as ''Wu wei' dragon has cause for peace and prosperity'.