George Matheson

Christian love is the only kind of love in which there is no rivalry, no jealousy. There is jealousy among the lovers of art; there is jealousy among the lovers of song; there is jealousy among the lovers of beauty. The glory of natural love is its monopoly, its power to say, ‘It is mine.’ But the glory of Christian love is its refusal of monopoly.

Augustine

Sin arises when things that are a minor good are pursued as though they were the most important goals in life. If money or affection or power are sought in disproportionate, obsessive ways, then sin occurs. And that sin is magnified when, for these lesser goals, we fail to pursue the highest good and the finest goals. So when we ask ourselves why, in a given situation, we committed a sin, the answer is usually one of two things. Either we wanted to obtain something we didn’t have, or we feared losing something we had.