Who said "Knowledge of the dark side is forbidden to the Jedi."?

This quote is attributed to Palpatine.

Knowledge of the dark side is forbidden to the Jedi. - Palpatine

"Knowledge of the dark side is forbidden to the Jedi."

Palpatine Education

"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!"

"Education opens doors."

"Education opens doors to endless possibilities."

"I ain't got the education you got, bub."

"You can't put a price on history."