Whether you're in the water staring up at a looming set or standing in front of 15000 people at a demo, you have to manufacture some courage and a sense of optimism in order to get through the moment, the day, the rest of your life.
Walk some night on a suburban street and pass house after house on both sides of the same street each with the lamplight of the living room, shining golden, and inside the little blue square of the television, each living family riveting its attention on probably one show; nobody talking; silence in the yards; dogs barking at you because you pass on human feet instead of wheels.