I’ve always said the difference between a con man and a visionary in Hollywood is success. Using the word “lie,” of course, puts it in a negative framework. Belief and vision and faith are the positive terms for practical visualization, where you not only see the picture but you do and say everything you can to make others see the picture until, one day, the picture is.
The producer is the one who dares to walk the tightrope between dream and reality, like the rope between the Two Towers. What makes a great producer is that he never gives up, even when the writer does, even when the studio does, even when everyone else does.