Emeritus Professor John Bigelow delivered this eulogy at the memorial service for David Armstrong in the Great Hall of the University of Sydney on July 16. Welcome to this gathering of commemoration for David Armstrong. I am John Bigelow, and I have worked as an academic philosopher in New Zealand and Australia in the area known as “metaphysics”. Throughout my career David Armstrong was a towering presence and inspiration, both to me and to many of the undergraduate and postgraduate students I taught and supervised. A friend of mine at La Trobe University, John Fox, once said that having disciples…