Edison isn't simply urging you to work harder—he's pointing out that our self-restraint often runs deeper than lack of ability. We possess capacities we've never tested, untested not because we lack talent but because we've accepted a smaller version of ourselves as the real one. Consider the person who discovers at fifty that they can write, paint, or lead, abilities that were always present but dormant beneath years of unexamined assumptions. The astounding part isn't the achievement itself; it's the revelation that we've been living in a fraction of our own house all along.