The following excerpt is from The Great Learning by Confucius:
“The ancients who wished to illustrate illustrious virtue throughout the kingdom, first ordered well their own states. Wishing to order well their states, they first regulated their families. Wishing to regulate their families, they first cultivated their persons. Wishing to cultivate their persons, they first rectified their hearts. Wishing to rectify their hearts, they first sought to be sincere in their thoughts. Wishing to be sincere in their thoughts, they first extended to the utmost their knowledge. Such extension of knowledge lay in the investigation of things. Things being investigated, knowledge became complete. Their knowledge being complete, their thoughts were sincere. Their thoughts being sincere, their hearts were then rectified. Their hearts being rectified, their persons were cultivated. Their persons being cultivated, their families were regulated. Their families being regulated, their states were rightly governed. Their states being rightly governed, the whole kingdom was made tranquil and happy. From the Son of Heaven down to the mass of the people, all must consider the cultivation of the person the root of everything besides. It cannot be, when the root is neglected, that what should spring from it will be well ordered.”
Will Durant, in “Our Oriental Heritage,” sums it up as follows (p. 668):
This is the keynote and substance of the Confucian philosophy; one might forget all other words of the Master and his disciples, and yet carry away with these “the essence of the matter,” and a complete guide to life. The world is at war, says Confucius, because its constituent states are improperly governed; these are improperly governed because no amount of legislation can take the place of the natural social order provided by the family; the family is in disorder, and fails to provide this natural social order, because men forget that they cannot regulate their families if they do not regulate themselves; they fail to regulate themselves because they have not rectified their hearts – i.e., they have not cleansed their own souls of disorderly desires; their hearts are not rectified because their thinking is insincere, doing scant justice to reality and concealing rather than revealing their own natures; their thinking is insincere because they let their wishes discolor the facts and determine their conclusions, instead of seeking to extend their knowledge to the utmost by impartially investigating the nature of things.
How few people operate this way today…