I have the great pleasure of having a really nice library at the White House. And I was tooling through some of the writings of some previous Presidents and I came upon this quote by Abraham Lincoln: “I am not bound to win, but I’m bound to be true. I’m not bound to succeed, but I’m bound to live up to what light I have.”
Lincoln never wrote those words. In an article on the NPR website, I explain that the president's speechwriter made an all-too-frequent error in using a Lincoln "quotation" without checking it. Public figures of all kinds -- Republicans and Democrats, liberals and conservatives -- have have passed along counterfeit Lincoln, usually without knowing it. President Reagan used the same 'bound to be true" line several times.
For anyone interested in following up, the Lincoln papers are searchable at these sites: