ANSWER: The difference between the natural and the moral, or between the negative and the positive. A natural holiness is con-created and without voluntary choice, and because it lacks volition, is natural rather than moral. It is negative, because it simply denotes the absence of impurity. When Adam chose holiness it was positive. What this positive element is, theologians have found difficult to state. I would modestly suggest that it is a chosen conformity to the nature of God, called perfect love, by St. John of Ephesus and St. John of Epworth.
— From Steele's Answers pp. 12, 13.