Confucius

When it is obvious that the goals cannot be reached, don't adjust the goals, adjust the action steps.

Faced with what is right, to leave it undone shows a lack of courage.

To see what is right and not to do it is want of courage, or of principle.

The firm, the enduring, the simple, and the modest are near to virtue.

How to play music may be known. At the commencement of the piece, all the parts should sound together. As it proceeds, they should be in harmony while severally distinct and flowing without break, and thus on to the conclusion.

They must often change, who would be constant in happiness or wisdom.

Look at the means which a man employs, consider his motives, observe his pleasures. A man simply cannot conceal himself!

The expectations of life depend upon diligence; the mechanic that would perfect his work must first sharpen his tools.

A youth, when at home, should be filial and, abroad, respectful to his elders. He should be earnest and truthful. He should overflow in love to all and cultivate the friendship of the good. When he has time and opportunity, after the performance of these things, he should employ them in polite studies.

To know what you know and what you do not know, that is true knowledge.

Never contract friendship with a man that is not better than thyself.

Silence is a true friend who never betrays.