Chapter 23, Part 8A - Chuang Tzu

Utilize the bounty of things and let them nourish your body; withdraw into thoughtlessness and in this way give life to your mind; be reverent of what is within and extend this same reverence to others. If you do these things and yet are visited by ten thousand evils, then all are Heaven-sent and not the work of man. They should not be enough to destroy your composure; they must not be allowed to enter the Spirit Tower. The Spirit Tower has its guardian, but unless it understands who its guardian is, it cannot be guarded.

If you do not perceive the sincerity within yourself and yet try to move forth, each movement will miss the mark. If outside concerns enter and are not expelled, each movement will only add failure to failure. He who does what is not good in clear and open view will be seized and punished by men. He who does what is not good in the shadow of darkness will be seized and punished by ghosts. Only he who clearly understands both men and ghosts will be able to walk alone.
~ Burton Watson translation via Terebess Asia Online ~

Go here to read the introductory post to the chapters of the Book of Chuang Tzu.