The Buddhist precepts aren't just guidelines help us live moral and beneficial lives, they're also practice tools for studying the self. As Zen master Dogen wrote, “To study the Buddha Way is to study the self. To study the self is to forget the self. To forget the self is to be verified by all things...” When we're tempted to break precepts, it's a sign that our "small self" has arisen, and we have the opportunity to observe what's happening and explore new ways to respond.