Lao Tzu said this quote
“ He who is in harmony with the Taois like a newborn child.Its bones are soft, its muscles are weak,but its grip is powerful.It doesn't know about the unionof male and female,yet its penis can stand erect,so intense is its vital power.It can scream its head off all day,yet it never becomes hoarse,so complete is its harmony.The Master's power is like this.He lets all things come and goeffortlessly, without desire.He never expects results;thus he is never disappointed.He is never disappointed;thus his spirit never grows old. ”