How do you know your wrong?

Greatest tragedy of each of us is how to know our wrong ,while knowledge, qualifications and understanding of our are always limited.

Geographical knowledge of a 12th grader(in Viet Nam) can't be wider, deeper, than what has been learned, and within that, he always said what he said is true; knowledge and level of depth a professor is also limited in the field of his research, and to the extent that he can not accept to be wrong in his field; as well as English learners, to some extent, the they also said they are right with what they learn...

But the world is immense, infinite universe, what do we know? Therefore, always open to knowledge from other people, always have access to the higher level, experts,constantly learning and a deeper look ... Most importantly, we must know what we knew and not know anything, do anything and not do anything.

Sometimes we discovered new something ,it was easy to fall into the misconception and truths that we knew. Once the truth is what is nothing else to look, to explore, more deeply? When you think no one knows what you have discovered the way to receive knowledge and input from knowledgeable people than our? So we are"dead or alive" with our misconception, and the opportunity to broaden our eyes was closed... 

Frogs sit bottom of the well and think cellar is the sky. When he emerged from the cellar ,he thought sky was in his sight .But the last thing he must find out that the limitless sky. Let us remember this lesson from him ,to keep his spirit continuous learning.