Abstract

The paper contends that, despite certain opinions to the contrary, St. Thomas Aquinas’s fourth argument for the existence of God in the Summa theologica admits of an intelligible interpretation, consistent with a systematic approach to the Five Ways. The argument is to the effect that, since the Third Way is about the conservation of corruptible species in an eternal universe, it might be expected that the Fourth Way would address the question of why corruptible species exist at all. And, in fact, the Fourth Way readily admits of such an interpretation: an informed universe requires an Informer.