How has the Christian faith and its virtue tradition influenced the science of positive psychology and virtue research? Many social scientists acknowledge that virtue reaches its full expression when embedded in a tradition, such as the Christian tradition. Gratitude, for instance, involves the realization that the good that comes to us in our lives often comes from a source outside of ourselves, which Christians often associate with God. We discuss these and other questions, including how pastors and Christians can cultivate the virtue of gratitude.