Appreciating your life isn’t always easy. Neuroscience professor Tali Sharot and Harvard law professor Cass R. Sunstein—authors of Look Again: The Power of Noticing What Was Always There—explain that we have our brains to thank for that, which often gets desensitized to things that make our lives good. In their new essay, Sharot and Sunstein detail how ordinary life can be resparkled again.