Since the work of Zielinski and Gothein in the early years of this century, it has been clear that the medieval and modern Catholic teaching of the seven cardinal sins, sometimes called the deadly sins, had a Hellenistic astrological origin. The details of that provenance, however, are still vague, and it is my purpose to add some further information tending to clarify the complex problems of origins. The material here presented will strengthen what must be a nebulous, though very probable, hypothesis. The problem, however, is not so much to show the exact origin of the concept, as it is to refute certain misleading orthodox theories of origin.