Since sin is a withdrawal from the First Principle, which is three and one, every sin distorts the image of the Trinity and defiles the soul in its three powers: the negative appetite, rationality, and the positive appetite. For every sin proceeds from free choice, which bears within itself the mark of the Trinity: because of its power, the will reflects the Father; because it is rational, the Son; because it is free, the Spirit.
[Bonaventure, Breviloquium, Monti, tr., Fanciscan Institute Publications (St. Bonaventure, NY: 2005) p. 127.]
