Everyone in the world knows how to seek for knowledge that they do not have, but do not know how to find what they already know.
To let understanding stop at what cannot be understood is a high attainment. Those who cannot do it will be destroyed on the lathe of heaven.
I cannot look at something through someone else's eyes. I can only truly know something which I know.
You wouldn't ask a blind man to appreciate a scene of beauty, nor a deaf man to enjoy the sounds of drums and bells. But it is possible to be blind and deaf in one's deep understanding, as well as physically.