"In this unit, we explore the mind's biology. We start small and build from the bottom up - from nerve cells up to the brain, and then to the environmental influences that interact with our biology. We will also work from the top down, as we consider how our thinking and emotions influence our brain and our health. And we'll consider the brain's ability to rewire itself as it adapts to experience and injury. Life changes us. You've heard it before and you'll hear it again: Nurture works on what nature provides" (Myers, 2018, p. 79).