This quote goes to the heart of the definition of ‘dream.’ To some, a dream is more a fantasy, something you engage in when you don’t have anything better to do, or don’t want to think about what you should be doing. To them, dreaming is the opposite of doing, right?
Perhaps using the phrase ‘day-dream’ in the quote would be a bit more precise and a bit less ambiguous. “I never day-dreamed about success. I worked for it.”