The Tao Te Ching is one old book. Like older-than-Jesus old. Written around the 6th century BC by the poet-philosopher Lao Tzu, the relatively short work is the fundamental text of Taoist philosophy. It’s also a stirring and delectable little read, 2600 years later.
Taoist teachings (along with other Oriental philosophy) seem to calm, stimulate, and refresh me, in part, I think, because they bear such a striking contrast to many of the ideas I was exposed to growing up in the Occident (the West)—i.e. the superiority of humankind, the glorification of force & control, the concept of a personal male deity, the desirability of individual accomplishment & recognition, etc.