Henry Ford? Virgil? John Dryden? John Herbert Phillips? Del Howard? Harlowe B. Andrews? Norman Vincent Peale? Mary Kay Ash? Apocryphal? Dear Quote Investigator: An aphorism highlighting the power of positive thinking and warning about the danger of negative thinking has often been attributed to automotive titan Henry Ford. Here are four versions: Whether you think … Continue reading Whether You Believe You Can Do a Thing or Not, You Are Right