One must change one's tactics every ten years if one wishes ... - Frederick the Great

This quote is attributed to Frederick the Great.

"One must change one's tactics every ten years if one wishes to maintain one's superiority."

Frederick the Great Change

Military King Prussian 1712–1786

More from Frederick the Great

"I have resolved never to start an unjust war, but never to end a just one except by conquest."

"A prince who loves his people and is loved by them is never in danger of rebellion."

"The more you own, the more it owns you."

"I am the first servant of the state."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."