" Everything changes. That’s the universal nature of outer reality and inner experience. Therefore, there’s no end to disturbed equilibria as long as you live. But to help you survive, your brain keeps trying to stop the river, struggling to hold dynamic systems in place, to find fixed patterns in this variable world, and to construct permanent plans for changing conditions. Consequently, your brain is forever chasing after the moment that has just passed, trying to understand and control it. It’s as if we live at the edge of a waterfall, with each moment rushing at us—experienced only and always now at the lip—and then zip, it’s over the edge and gone. But the brain is forever clutching at what has just surged by. "

― Rick Hanson , Buddha's Brain: The Practical Neuroscience of Happiness, Love, and Wisdom