Quote by John Wanamaker
"To know yourself is to understand your customer."
More from John Wanamaker
"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."