Who said "Fear is just an opportunity to prove yourself."?

This quote is attributed to Flexo.

Fear is just an opportunity to prove yourself. - Flexo

"Fear is just an opportunity to prove yourself."

Flexo Fear

"Bending is an art, and I am its masterpiece."

"Why settle for one beautiful thing when you can have many?"

"A true bender never bends the same way twice."

"Shiny things call to those with refined tastes."

"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."