This sort of thing has been around for a long time. See "The Power of Positive Thinking" (1952), by Norman Vincent Peale.[1]

The short version: "Insecure", by Joan Jett.[2]

The century-old version: YMCA Salesmanship Training Manual, 1920.[3]

[1] https://www.amazon.com/dp/B000FC0SXM [2] https://www.youtube.com/watch?v=SAVeAVvJIoo [3] https://books.google.com/books?id=CBFPAAAAYAAJ