Who said "Love is the most powerful weapon of all."?

This quote is attributed to Peeta Mellark.

Love is the most powerful weapon of all. - Peeta Mellark

"Love is the most powerful weapon of all."

Peeta Mellark Love

Character in Catching Fire

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"I can't help how I feel about you. I can't help anything."

"I'm in love with you. I'm sorry."

"What I need is the REAL you."

"I'll be waiting, though. If you change your mind."

"I love my wife, but sometimes she drives me crazy."

"Love conquers all obstacles."

"Love is patient, love is kind."

"I'm not stupid, I'm just in love!"