Metta practice is one version of the ancient vocation to live from kindness and love, that is found across spiritual traditions. In Buddhist tradition, it is in the family of “heart practices” that are called the brahmavihara: Lovingkindness, compassion, appreciative joy, and equanimity. In this context, we explore how metta practice both opens us up to this deep kindness and warmth and to what is the way of metta. We also examine some of the challenges of metta practice.