Who said "I'm going to work harder than I've ever worked before."?

This quote is attributed to Leslie Knope.

I'm going to work harder than I've ever worked before. - Leslie Knope

"I'm going to work harder than I've ever worked before."

Leslie Knope Motivation

"I have not slept in 37 hours. I have achieved so much."

"Treat yo' self."

"I'm not crying. I'm just sweating from my eyes."

"Everything is the worst thing that's ever happened."

"I believe in working hard for what you want."

"Never underestimate the power of determination."

"I don't need a reason to fight."

"The most important thing is the mission. Nothing else matters."