Steven J. Sandage (PhD, LP) is the Albert and Jessie Danielsen Professor of Psychology of Religion and Theology at Boston University and research director and senior staff psychologist at the Danielsen Institute. He has faculty appointments at Boston University in the School of Theology, the department of Psychological and Brain Sciences, and the graduate division of religious studies. His co-authored/coedited books include , , , , and . He has also published articles and chapters on forgiveness, humility, spirituality in psychotherapy, psychology of religion, intercultural competence and social justice, narcissism, borderline personality disorder, and suicide, among other areas. Sandages research has been funded by the John Templeton Foundation, the Lilly Endowment, and the Fetzer Institute. Currently, he practices as a Licensed Psychologist at the Danielsen Institute with clinical specializations including couple and family therapy, multicultural therapy, and spiritually-integrative therapy. He also provides diversity training for mental health, educational, ministry, and business settings.
Everett L. Worthington Jr. (Ph.D., University of Missouri) is professor of psychology at Virginia Commonwealth University. He is a licensed clinical psychologist and former executive director of the Templeton Foundation's A Campaign for Forgiveness Research. Worthington has studied forgiveness since the 1980s and has published more than two hundred articles and papers on forgiveness, marriage and family, psychotherapy and virtue in a wide variety of journals and magazines. He was the founding editor of and sits on the editorial boards of several professional journals. He has appeared on CNN and and been featured in award-winning documentary movies on forgiveness such as and He is the author of seventeen books including and