Who said "Act as if what you do makes a difference. It does."?

This quote is attributed to William Halsey.

Act as if what you do makes a difference. It does. - William Halsey

"Act as if what you do makes a difference. It does."

William Halsey Inspiration

Military Admiral American 1882–1959

"Hit hard, hit fast, hit often."

"There are no great men, only great challenges that ordinary men are forced by circumstance to meet."

"The only thing worse than a battle lost is a battle won."

"Damn the torpedoes, full speed ahead!"

"The best part of living is knowing you survived."

"The world needs heroes."

"Life is too short to live poorly."

"I'd rather be an optimist and be wrong than a pessimist and be right"