Who said "I believe in the power of rational thought."?

This quote is attributed to Velma Dinkley.

I believe in the power of rational thought. - Velma Dinkley

"I believe in the power of rational thought."

Velma Dinkley Philosophy

"Jinkies!"

"My glasses! I can't see without my glasses!"

"Let's split up, gang."

"This is no accident. There are clues here."

"I've seen the worst humanity has to offer."

"Sometimes I wonder if the world is worth saving."

"Every choice shapes our destiny."

"Order is the foundation of a good life."