What is bestowed by heaven is called human nature. The fulfillment of human nature is called the Tao. The cultivation of the Tao is called true learning.
The Tao is the law of nature, which you cannot depart from for even one instant. If you could depart from it, it wouldn’t be the Tao. Thus the mature person looks into his own heart and respects what is unseen and unheard. Nothing is more manifest than the hidden; nothing is more obvious than the unseen. Thus the mature person pays attention to what is happening in his innermost self.
Confucius said, ”To find the Tao, there is no need to search. If it is not inside you, it is not the Tao.”