Real knowledge is to know the extent of one's ignorance.
Ignorance is a willful neglect or refusal to acquire knowledge. Having no ignorance means the perspective or consciousness has become one with all there is. An example of this would be considering yourself a genius, and not realizing that there are thousands of people smarter than you.
I hear and I forget. I see and I remember. I do and I understand.
We have to experience something ourselves in order to really understand it. If we hear something, it must be interesting. If we see something, it must be beautiful. For example, picture yourself losing someone or something you love. Can you know this by hearing or seeing it? Or do you have to experience it yourself before you truly know it?
Everything has beauty, but not everyone sees it.
Confucius asks us to drop our way in which we see the world, usually distorted by our wants and beliefs. We must look at things as they truly are. If we are able to do this without judgment, we can see everything in nature as it should be. This natural state of perfection is beauty.