True knowledge is when one knows the limitations of one's knowledge.

If you don't know how to live, why wonder about death?

He who cannot describe the problem will never find the solution to that problem.

If proper in their own conduct, what difficulty would they have in governing? But if not able to be proper in their own conduct, how can they demand such conduct from others?

To be fond of learning is near to wisdom; to practice with vigor is near to benevolence; and to be conscious of shame is near to fortitude.

All the darkness in the world can't put out the light of one candle.

In language clarity is everything.