Dr. Isaac Rufus Clark (1925-1990), the son of Reverend James H. and Lillian Clark was born February 15, 1925, in New Castle, Pennsylvania. He graduated from New Castle public schools in 1943. After graduation, Clark served in the U.S. Navy until 1946. He received his Bachelor of Arts degree from Wilberforce University in 1951, and in 1952, he received his Bachelor of Divinity degree from Payne Theological Seminary. Dr. Clark went on to receive his Ph.D. in Theology from Boston University in 1958, after successfully defending his dissertation, Redemption in the Thought of Albert Knudsen and Emil Brunner. Clark was a lifelong member of the African Methodist Episcopal Church. He made public his call to the ministry in 1946, and in 1952 he was ordained as an elder. He served pastorates in Milford, Ohio, and in Lynn and New Bedford, Massachusetts. In 1955, Clark became Professor of Systematic Theology at Payne Theological Seminary, then in 1960, he became the Dean of the College and Professor of Religion and Philosophy at Paul Quinn College in Waco, Texas. In 1962, Dr. Clark joined the faculty at the Interdenominational Theological Center as Professor of Homiletics and Director of Field Education. During his twenty-eight-year tenure as a professor, he also served as registrar (1969-1975) and director of the summer session. In recognition of his contributions as a professor and scholar, in 1975 he was chosen to be the first Fuller E. Callaway Professor of Homiletics at the Interdenominational Theological Center which he held until his death at the age of 64.