A fascinating lecture by John Piper, introducing John Gresham Machen. Very informative. Talks about modernism, fundamentalism, Princeton seminary, Machen’s experience in Germany, his encounter with liberalism/modernism, the sprit of modern age, and more. Highly recommended. Your time will not be wasted. http://www.desiringgod.org/resource-library/biographies/j-gresham-machens-response-to-modernism