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This is how St. Thomas in the Summa handles it in Question 85,The effects of sin, and, first, of the corruption of the good of nature; Article 1. Whether sin diminishes the good of nature? :
Thus, one part in the three of human nature is continued to be diminished by sin; the part he names “the inclination to virtue.”I answer that, The good of human nature is threefold. First, there are the principles of which nature is constituted, and the properties that flow from them, such as the powers of the soul, and so forth. Secondly, since man has from nature an inclination to virtue, as stated above (60, 1; 63, 1), this inclination to virtue is a good of nature. Thirdly, the gift of original justice, conferred on the whole of human nature in the person of the first man, may be called a good of nature.
Accordingly, the first-mentioned good of nature is neither destroyed nor diminished by sin. The third good of nature was entirely destroyed through the sin of our first parent. But the second good of nature, viz. the natural inclination to virtue, is diminished by sin. Because human acts produce an inclination to like acts, as stated above (Question 50, Article 1). Now from the very fact that thing becomes inclined to one of two contraries, its inclination to the other contrary must needs be diminished. Wherefore as sin is opposed to virtue, from the very fact that a man sins, there results a diminution of that good of nature, which is the inclination to virtue.