From the Book of Chuang Tzu: Chapter 17 the Autumn High-Water, Part 2 of 2

“He who understands the Way is certain to have command of basic principles. He who has command of basic principles is certain to know how to deal with circumstances. And, He who knows how to deal with circumstances will not allow things to do him harm. When a man has perfect virtue, fire cannot burn him, water cannot drown him, cold and heat cannot afflict him, birds and beasts cannot injure him. I do not say that he makes light of these things. I mean that he distinguishes between safety and danger, contents himself with fortune or misfortune, and is cautious in his comings and goings. Therefore, nothing can harm him.”