Who said "The best revenge is success. I'm working on it."?

This quote is attributed to Mandy.

The best revenge is success. I'm working on it. - Mandy

"The best revenge is success. I'm working on it."

Mandy Motivation

"I'm not your friend. I'm your leader."

"Happiness is for the weak."

"You will obey me."

"I don't have time for your nonsense."

"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."