At 15 I set my heart on learning; At 30 I firmly took my stand; At 40 I had no delusions; At 50 I knew the Mandate of Heaven; At 60 my ear was attuned; At 70 I followed my heart's desire without overstepping the boundaries of right.
If there were an honorable way to get rich, I’d do it, even if it meant being a stooge standing around with a whip. But there isn’t an honorable way, so I just do what I like.
To know, is to know that you know nothing. That is the meaning of true knowledge. When you say something, say what you know. When you don't know something, say you don't know. That is knowledge.
Although your father and mother are dead, if you propose to yourself any good work, only reflect how it will make their names illustrious, and your purpose will be fixed.
Those people who develop the ability to continuously acquire new and better forms of knowledge that they can apply to their work and to their lives will be the movers and shakers in our society for the indefinite future.