The more you experience positive emotions, the more open you become. The more open you are, the more you see. The more you see, the more you can do. The more you can do, the more you can grow.
The human being cannot live in a condition of emptiness for very long: if he is not growing toward something, he does not merely stagnate; the pent-up potentialities turn into morbidity and despair, and eventually into destructive activities.