Keeping in mind that Alyosha is the "hero" of the story . . .
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It's always worthwhile to seek out authorial intent. In one way, Brothers K functions as a contemplation of morality. Each member of the family (and their dear ole dad) each has a markedly different way of living his life, and his moral decisions affect the way he lives. Alyosha seeks a certain simplicity that he learned from his religious teachers, and while it's usually a bit simple to say Doestoevsky's provides a "moral" to his novels, he is a highly moral writer and considering which brother's perspective he embraces helps to understand the novel.