To err and not reform, this may indeed be called error.

If I am virtuous and worthy, for whom should I not maintain a proper concern?

Time flows away like the water in the river.

Therefore only through education does one come to be dissatisfied with his own knowledge, and only through teaching others does one come to realize the uncomfortable inadequacy of his knowledge. Being dissatisfied with his own knowledge, one then realizes that the trouble lies with himself, and realizing the uncomfortable inadequacy of his knowledger.

The gem cannot be polished without friction nor man without trials.

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

When a nation or family is about to flourish, there are sure to be happy omens; and when it is about to perish, there are sure to be unlucky omens.