To know, is to know that you know nothing. That is the meaning of true knowledge.

True knowledge exists in knowing that you know nothing.

I don't know the true meaning of happiness.

To know what you know and what you do not know, that is true knowledge.

To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.

The broad spectrum of knowledge, the ability to probe into the meaning of an event and the ability to write clearly and concisely in newspaper style are the essence of professionalism.