M.J. Ryan is a consultant and author whose books include Attitudes of Gratitude: How to Give and Receive Joy Every Day of Your Life and A Grateful Heart.

Deborah Norville, anchor of the TV newsmagazine Inside Edition, wrote Thank You Power: Making the Science of Gratitude Work for You (2007), which explores the scientific research behind gratitude.

Louise L. Hay wrote Gratitude: A Way of Life. She is the owner and founder of Hay House, an international mind-body-spirit publisher in Carlsbad, Calif.

Patricia Campbell Carlson is former executive director of A Network for Grateful Living, a Web-based organization that promotes gratitude as a spiritual practice. Carlson lives in Ithaca, N.Y.

Dr. Uma Mysorekar is a former president of the Hindu Temple Society of North America in Flushing, N.Y., and a practicing obstetrician-gynecologist. She has represented Hinduism at interfaith conferences sponsored by the White House. She has written about the Hindu view of gratitude.

Gregg Krech is the author of Naikan: Gratitude, Grace and the Japanese Art of Self-Reflection. Naikan is a Japanese method of self-examination that prompts reflection on gratitude to others for what you have been given. Based on Eastern spiritual teachings and Japanese psychology, Naikan is used to promote mental health. Krech is the executive director of the ToDo […]

David Steindl-Rast is a Benedictine brother and a senior member of the Benedictine community at Mount Savior in Elmira, N.Y. He is the author or co-author of five books, including Gratefulness, the Heart of Prayer: An Approach to Life in Fullness. He is a member of A Network for Grateful Living, which maintains the Web site Gratefulness.org. He […]

Lamin Sanneh is the D. Willis James Professor of Missions and World Christianity at Yale University. He wrote the entry “Gratitude and Ingratitude” in the Encyclopaedia of the Qur’ān.

Robert C. Roberts is a professor of ethics at Baylor University. He specializes in virtues and emotions and wrote the entry on gratitude in New Dictionary of Christian Ethics & Pastoral Theology.