For more than a decade, Gretchen Rubin had been studying happiness and human nature. Then, one day, a visit to her eye doctor made her realize that she'd been overlooking a key element of happiness: her five senses. She'd spent so much time stuck in her head that she'd allowed the vital sensations of life to slip away, unnoticed. This epiphany lifted her from a state of foggy preoccupation into a world invigorated by seeing, hearing, smelling, tasting, and touching. In this New York Times bestselling journey of self-experimentation, Rubin explores the mysteries and joys of the five senses as a path to a happier, more mindful life. Drawing on cutting-edge science, philosophy, literature, and her own efforts to practice what she learns, she investi gates the profound power of tuning in to the physical world. From the simple pleasures of appreciating the magic of ketchup and adding favorite songs to a playlist, to more adventurous efforts like creating a daily ritual of visiting the Metropolitan Museum of Art and attending a flavor university, Rubin shows us how to experience each day with depth, delight, and connection. In the rush of daily life, she finds, our five senses offer us immediate, sustainable ways to cheer up, calm down, and engage the world around us-as well as ways to glimpse the soul and touch the transcendent.