You think you know?

"All this the world well knows;
yet none knows well."

From: Sonnet CXXIX
By: William Shakespeare

I am not a Shakespeare fan. And I have no idea in what context this line was written. But somewhere it touches a chord. That you think you know, but you don't. It may be because there is something hidden purposefully. Or it may be that you are looking for the wrong thing or you are looking the wrong way or....

Mostly true with people. Sometimes true with facts.
Weird.

Is this Motorcycle maintenance or is this just you?