Who said "I've learned that hope is the most powerful weapon."?

This quote is attributed to Effie Trinket.

I've learned that hope is the most powerful weapon. - Effie Trinket

"I've learned that hope is the most powerful weapon."

Effie Trinket Hope

"Happy Hunger Games, and may the odds be ever in your favor!"

"We have a lot to do. Smile. It could be worse."

"I'm not entirely sure what you mean. You seem perfectly adequate."

"These are your stylists. They'll prepare you for the opening ceremony."

"Every day is a new opportunity."

"Hope is what gets us through difficult times."

"I'm not your enemy, kid. I'm trying to save you."

"Redemption is a long road."