John Frame is an American theologian and philosopher known for his work in the field of Reformed theology. He has authored numerous books and articles, focusing on the relationship between faith and reason, as well as the application of biblical principles to various aspects of life. Frame is particularly recognized for his contributions to the understanding of theology, philosophy, and Christian ethics. Frame has served as a professor at several institutions, including Reformed Theological Seminary and Westminster Theological Seminary. His teaching emphasizes the importance of a comprehensive worldview grounded in Scripture. Additionally, he is known for his development of the "tri-perspectival" approach, which examines issues from three perspectives: the normative, the situational, and the existential.