Who said "Knowledge of your enemy is half the battle."?

This quote is attributed to Team Rocket.

Knowledge of your enemy is half the battle. - Team Rocket

"Knowledge of your enemy is half the battle."

Team Rocket Knowledge

"Prepare for trouble, and make it double!"

"To protect the world from devastation!"

"To unite all peoples within our nation!"

"To denounce the evils of truth and love!"

"We're not just after treasure. We're preserving history."

"The mind is humanity's greatest tool."

"A tidy room reflects a tidy mind."

"You can learn a lot about a person by how they keep their space."