Who said "Never underestimate the power of determination."?

This quote is attributed to Timmy.

Never underestimate the power of determination. - Timmy

"Never underestimate the power of determination."

Timmy Success

"Timmy!"

"Timmy timmy timmy!"

"Timmeh!"

"Timmy loves his friends."

"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."