I hear and I forget.  I see and I remember.  I do and I understand.

If you know, recognize that you know,
If you don't know, then realize that you don't know:
That is knowledge.

There are three things which the superior man guards against. In youth, when the physical powers are not yet settled, he guards against lust. When he is strong and the physical powers are full of vigor, he guards against quarrelsomeness. When he is old, and the animal powers are decayed, he guards against covetousness.

For one word a man is often deemed to be wise, and for one word he is often deemed to be foolish. We ought to be careful indeed in what we say.

Those who are born with the possession of knowledge are the highest class of men. Those who learn, and so readily get possession of knowledge, are the next. Those who are dull and stupid, and yet compass the learning, are another class next to these. As to those who are dull and stupid and yet do not learn; -- they are the lowest of the people