Disney's real wisdom here isn't about blind faith, but about the paralysis that comes from hedging your bets—the creative death of doing something with one foot out the door. When he built Disneyland, he didn't believe in it *mostly* or *probably*; that total commitment became the difference between a theme park that felt like a genuine world and one that felt like a collection of attractions. Notice he says "implicitly"—not loudly or performatively, but with quiet certainty in your bones—which is why the most convincing believers often seem calm rather than feverish. A surgeon who operates with 80% confidence in her diagnosis will hesitate in moments that demand decisiveness; a businessperson building something untested needs that full-bodied conviction to push through when early returns disappoint.