I like the water metaphor because we have all experienced foul, stagnant pools of water, and most know how that is just a breeding ground for disease. And we have spent time around clean, flowing brooks. In human lives, think of hoarders: people who collect goods, which are really just manifestations of energy, and fill their space with them. This too is a breeding ground for disease, both physical and psychological. From a different angle, think now of generosity: how good it feels to give to another, no strings attached.