28. it is certain that when money clinks in the money chest, greed and avarice can be increased; but when the church intercedes, the result is in the hands of god alone.32. those who believe that they can be certain of their salvation because they have indulgence letters will be eternally damed, together with their teachers. what is the main idea of these two theses? selling indulgences is acceptable, but only in very rare situations. selling indulgences leads to corruption, greed, and a false hope of salvation. selling indulgences is only acceptable when the catholic church does it. selling indulgences is a certain path to salvation in the hands of god.