Came to the United States, 1931, naturalized, 1941. Ordained to ministry Presbyterian Church United States of America, 1938. Instructor, then assistant professor and associate professor of religion Amherst College, 1931-1945.
Became professor preaching and preacher to the university, Duke, 1945, James B. Duke professor of preaching, 1954-1968, dean of the chapel, 1953-1973, consultant to chapel, 1973-1978. Visiting professor preaching Union Theological Seminary, New York City, summers 1948, 55, 62, Pacific School Religion, Berkeley, California, summer 1951. Frederic Rogers Kellogg lecturer Episcopal Theological School, 1953.
Hoyt lecturer Union Theological Seminary, 1955. Peyton lecturer Southern Methodist U., 1956. Zimmerman lecturer Lutheran Theological Seminary, 1956.
Thomas White Currie lecturer Austin Presbyterian Seminary, 1958. Wells sermons lecturer Texas Christian U., 1959, 69. Perkins lecturer First Methodist Church, Wichita Falls, Texas, 1961.
Warrack lecturer theological colls. four Scottish universities, 1964.