Who said "Winning isn't everything, but losing isn't anything."?

This quote is attributed to Charlie Brown.

Winning isn't everything, but losing isn't anything. - Charlie Brown

"Winning isn't everything, but losing isn't anything."

Charlie Brown Success

"Good grief!"

"I got a rock."

"Rats! I did it again."

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

"Success comes to those who never give up."

"Success is measured by happiness, not money."

"You make your own luck in this world."

"You have to be organized to be successful in anything."