I came across this comment in a forum I was reading recently. It's pretty good!
A friend suggests the following little pair of experiments for anybody wishing to better comprehend the present state of astronomical knowledge:
Get onto the Google search engine and type in "Astronomers surprised".
The resulting list goes on, and on, and on.................... and on. It's good for us to keep aware of how surprised they always are.
Then go into Google again and type "Astronomers confident" This will also produce a magnificently long listing of how absolutely confident they are about their knowledge. Strange how many times they are "surprised" and yet they maintain such absolute "confidence".
I wonder what the surprise/confident ratio is. Both lists seem infinitely long....