“If you think you can, you can. If you think you can't, you're right.”
Mary Kay Ash (1918–2001) Entrepreneur
Variant: If you think you can, you can. And if you think you can not, you are right.
“If you think you can, you can. If you think you can't, you're right.”
Mary Kay Ash (1918–2001) Entrepreneur
Variant: If you think you can, you can. And if you think you can not, you are right.
“Whether you think you can, or you think you can't — you're right.”
Henry Ford (1863–1947) American industrialist
"On Monsieur Coué", Epigram in The Week-end Book (1928), p. 217.
Christopher McDougall (1962) American journalist and writer
Source: Born to Run: A Hidden Tribe, Superathletes, and the Greatest Race the World Has Never Seen
Alanis Morissette (1974) Canadian-American singer-songwriter
Can't Not
Supposed Former Infatuation Junkie (1998)