Hope is not optimism. Optimism is expecting things to work out. Hope is something else, and the research separates them cleanly: hope has two components, the belief that you can find routes to what matters, and the will to walk them. Optimism is a forecast. Hope is a plan and the energy to try it. This is why hope predicts how people actually perform under pressure while optimism often doesn't — one of them requires you to do something.
The optimists do worst. When Admiral Jim Stockdale was asked who didn't survive the prison camp, his answer was the optimists — the men who were certain they'd be home by Christmas, and then by Easter, and then by the next Christmas, and eventually died of a broken heart. The people who came through held two things at once: complete honesty about how bad it was, and an unshakeable conviction that they would prevail in the end. Those aren't in tension. Hope that depends on not looking at the facts will break the first time the facts insist.
Hopelessness usually arrives as a fact about yourself. Not "this is hard" but "people like me don't do that." A woman once told Dave exactly that when he suggested she try slalom skiing, and it wasn't an assessment of the difficulty — it was a description of a category she'd placed herself in. He skied beside her holding her vest and asked her to lift one ski. She did, tentatively, and something shifted before she'd achieved anything at all. Within minutes she was doing the thing people like her didn't do.
It can be trained. Hope isn't a temperament you were issued at birth. Both halves of it — seeing more than one route, and generating the will to move — respond to practice, which means it's a leadership skill rather than a personality trait. It also means you can install it in other people, and that most of them are waiting for someone to.
That's what hope is — not a feeling about the future, but the ability to find the next move when the obvious one has closed.