Who said "I learned early that if you cannot serve, you cannot lead."?

This quote is attributed to John Wanamaker.

I learned early that if you cannot serve, you cannot lead. - John Wanamaker

"I learned early that if you cannot serve, you cannot lead."

John Wanamaker Leadership

Retail Innovator American 1838–1922

"Half the money I spend on advertising is wasted; the trouble is I don't know which half."

"The public is wonderfully tolerant. It forgives everything except genius."

"One thing is sure. We cannot deny our past. Our task is not to fight it, but to fulfill our obligations to the present."

"A merchant who sells goods at a loss will be bankrupt in six months."

"A leader must be fair and just."

"Integrity is everything."

"One must take responsibility for one's environment."

"In this house, I make the decisions"