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.
ConfuciusChi Wen Tzu always thought three times before taking action. Twice would have been quite enough.
ConfuciusThere is nothing impossible in all the world except that the heart of man is wanting in resolution.
Confucius