Who said "The Jedi are not as they once were."?

This quote is attributed to Palpatine.

The Jedi are not as they once were. - Palpatine

"The Jedi are not as they once were."

Palpatine Change

"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!"

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."