Who said "If you only knew the power of the dark side."?

This quote is attributed to Palpatine.

If you only knew the power of the dark side. - Palpatine

"If you only knew the power of the dark side."

Palpatine Wisdom

"Did you ever hear the tragedy of Darth Plagueis the Wise?"

"The dark side of the Force is a pathway to many abilities some consider to be unnatural."

"Have you ever heard of the tragedy of Darth Plagueis? I thought not."

"Unlimited power!"

"I'm not angry, I'm just disappointed."

"The best things in life are free."

"You can't have everything in life, but you can have what matters most."

"A woman's intuition is rarely wrong."