Law of impermanence is a direct result of the flowing nature of the reality. Nothing here stays, everything comes and goes. Clinging to all that which is not going to stay is a cause of suffering. Knowing that the life is not about accumulating, getting, bonding or doing, it is only a continuous flow of experiences, frees us from the suffering. Reality is all that can be experienced, and by its very nature, it is momentary, ephemeral and ever changing. In contrast, the Self is changeless, eternal and the only thing that lasts, it is what I am. So detaching with what comes and goes and identifying with what remains is the key that frees us from suffering.