Lex Miller's career had three sides: The articulation of the Christian faith in the academic setting, the service of the Christian Church, both his own Presbyterian denomination and Protestant Christianity at large, and the bringing of Christianity to bear on the social, economic, and political spheres of secular life. Of these three ends, the last is a thread running throughout his life. In a day when passions ran high over pacifism, the labor movement, and unemployment, he accumulated an impressive jail record in New Zealand from picketing and pacifist demonstrations. In New Zealand he served as a Presbyterian divine and was active in the Student Christian Movement. He also became a huge influence in making the later philosopher and logician
Arthur Norman Prior a "quick and keen convert" to Miller's Barthian calvinism. Arthur Prior and Alexander Miller worked together on the Student Christian Movement magazine Open Windows. He later went to Detroit in a liaison job between Christian students and industrial workers. It was there that he impressed
Reinhold Niebuhr by his activities, and was recommended by Niebuhr as a Lecturer in Religion at Stanford University. He was the first Professor of Religion at Stanford and in 1950 inaugurated their Department of Religion and became its Head. University). His students were brought through an unusually wide gamut of theological subject-matter and an approach to a theology concerned with the real world. He delivered the
William Belden Noble Lectures at Harvard in 1957, which were published as his 1958 book
The Man in the Mirror. He wrote two books for Niebuhr's 'Christian Faith' series. In total, he authored 8 books. ==Ministry==