Imagine yourself being trapped in one place, where you see nothing but the darkness. Half wearing out your strength, there you see several tiny fire balls coming your way. What do you think that would be? And what would be your first reaction? People coming to rescue? Or spirit? For those who thought of the rescue team, they probably have strong will-power and optimistic whereas the latter one would be the opposite. In many ways, will-power is pretty important in holding onto our stand. Without strong will-power, we might be easily affected by the people around. And of course, it varies with the situation occured.