We suggest you turn to the Tao Teh Ching:
55 Rich in virtue, like an infant, Noxious insects will not sting him; Wild beasts will not attack his flesh Nor birds of prey sink claws in him. His bones are soft, his sinews weak, His grip is nonetheless robust; Of sexual union unaware, His organs all completely formed, His vital force is at its height. He shouts all day, does not get hoarse: His person is a harmony. Harmony experienced is known as constancy; Constancy experienced is called enlightenment; Exuberant vitality is ominous, they say; A bent for vehemence is called aggressiveness. That things with age decline in strength, You well may say, suits not the Way; And not to suit the Way is early death. -- tr. R. Blakney