Impermanence shattered our illusion of security and certainty. When we realized that the ground beneath our feet is not solid and going to step on⋯⋯ empty air at any time, we instinctively want to seize something, this is where attachment comes from. And what we want to seize, to rely on. In fact, they are essentially are cannot be hold and unreliable, from these it create pain and suffering in resulting.