Mary illustrates that peyote rituals are ceremonies that evolve over time. For one, women now sing during peyote ceremonies, even though they were not traditionally permitted to sing. This change also shows how gender roles are being challenged within the Native American community. Second, the songs within a peyote meeting can change. Mary writes about how Leonard adopts and incorporates songs from different tribes to use in the ceremonies he puts on. The implication is that Leonard sees spiritual value in the songs of other tribes; although these songs might not be songs that the Lakota traditionally used in peyote meetings, he finds that they are useful for him and his participants, regardless of their tribe. He also invents his own songs, which means that he is adding something completely new to the rituals.