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.
There is a growing interest in Confucianism in China and other parts of the world. More and more followers of Confucianism are advocating a deeper study of his philosophies. Confucius' ideals stand true even today. His philosophy on how to be a Junzi or the perfect gentleman is based on the simple ideology of love and tolerance.
We can know a person by observing his behaviour, understanding the reasons for his actions and ascertaining his intentions. If we do this, how can we not know him?