Who said "I wonder if anybody really knows what's going on."?

This quote is attributed to Charlie Brown.

I wonder if anybody really knows what's going on. - Charlie Brown

"I wonder if anybody really knows what's going on."

Charlie Brown Knowledge

"Good grief!"

"I got a rock."

"Rats! I did it again."

"Why is it that everything I do turns into a disaster?"

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."