Quote Investigator has tackled this one: http://quoteinvestigator.com/2010/07/14/luck/ http://quoteinvestigator.com/2010/07/14/luck/ The upshot is that its or

Quote Investigator has tackled this one: http://quoteinvestigator.com/2010/07/14/luck/ http://quoteinvestigator.com/2010/07/14/luck/ The upshot is that its origin is unknown, but goes back at least to a Walter Winchell column from 1949. Gary Player used it and became associated with it. The attribution to Jefferson is nonsense, of course.