Constant Learning

This is one of my favorite mind maps from a tweet by @ProfFeynman:

The more you know, the more you know what you don’t know! What you know is inside a circle, what you don't know is outside of it. The circumference is what you know you don't know. As your knowledge grows, the circle grows and the circumference expands.

It basically makes you realize that you don't know what you don't know.