Who said "What if I tried really hard and still failed?"?

This quote is attributed to Charlie Brown.

What if I tried really hard and still failed? - Charlie Brown

"What if I tried really hard and still failed?"

Charlie Brown Fear

"Good grief!"

"I got a rock."

"Rats! I did it again."

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

"Face your fears with courage."

"You can't live your life in fear."

"Snakes. Why'd it have to be snakes?"

"Fear is just another obstacle to overcome."