Dr. Mark Greenberg, Director of the Prevention Research Center at Penn State University, examines the relationships between intrapersonal mindfulness activities, such as sitting and walking meditation, and interpersonal mindfulness activities, such as deep listening, regulating one’s emotional reactions, and practicing compassion. He highlights the ethical dimension of mindfulness, which is often de-emphasized. He concludes with a call for a research agenda that explores how intra- and interpersonal mindfulness activities and outcomes are related, as well as an examination of the outcomes of mindfulness activities in different contexts.