Who said "True strength means standing alone if necessary."?

This quote is attributed to Team Rocket.

True strength means standing alone if necessary. - Team Rocket

"True strength means standing alone if necessary."

Team Rocket Strength

"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!"

"Strength comes from within."

"A woman should be proud of who she is."

"A strong woman can overcome anything."

"The only thing I'm good at is killing."