" You also have a “reptile brain” that allows you to act instinctually and make split-second survival decisions, and a “mammal brain” that leads you toward connection and relationships. One part of your brain is devoted to dealing with memory; another to making moral and ethical decisions. It’s almost as if your brain has multiple personalities—some rational, some irrational; some reflective, some reactive. No wonder we can seem like different people at different times! The key to thriving is to help these parts work well together—to integrate them. "

― Daniel J. Siegel , The Whole-Brain Child: 12 Revolutionary Strategies to Nurture Your Child's Developing Mind, Survive Everyday Parenting Struggles, and Help Your Family Thrive