Who said "Perhaps I can find new ways to motivate them."?

This quote is attributed to Darth Vader.

Perhaps I can find new ways to motivate them. - Darth Vader

"Perhaps I can find new ways to motivate them."

Darth Vader Motivation

"I find your lack of faith disturbing."

"The Force will be with you, always."

"I am altering the deal. Pray I don't alter it any further."

"There is no escape. Don't make me destroy you."

"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."