In 1924 and 1925, relations among the Princeton faculty deteriorated when The Presbyterian questioned if there were two different parties on the faculty. In response Machen remarked that his differences with Charles Erdman related to the importance they attributed to doctrine. He noted that Erdman was tolerant of those in doctrinal error. Erdman wrote privately 'he (Dwight L. Moody) knew that controversialists do not usually win followers for Christ.'
