Is your mind completely filled with thoughts of something? That’s called obsession (痴迷). When we think of obsession, we tend to think of the __1__ aspects of extreme behavior. It can be unhealthy or dangerous. However, actually，“productive obsessing” can be not only a __2__ for boredom and passivity, but also the recipe for a __3__ life. Having a productive obsession appears to __4__ people to do this, even if things get tough. In contrast, those without passion (激情) may end up letting challenge ...