"The maker who knows his article best would be the best advertising man, if only his interests did not warp his view."
— Claude Hopkins
The Maker Who Knows His Article
The maker who knows his article best would be the best advertising man, if only his interests did not warp his view.
About this quote
From My Life in Advertising (1927), Hopkins's autobiography. He was observing that manufacturers who know their product intimately often become its worst advocates because their attachment distorts their judgment — they emphasize features that fascinate them rather than benefits that move customers. Hopkins built his career partly on his willingness to study a product from the consumer's perspective rather than the maker's.
Source
My Life in Advertising