All writing, all art, is an act of faith. If one tries to contribute to human understanding, how can that be called decadent? It's like saying a declaration of love is an act of decadence. Any work of art, provide it springs from a sincere motivation to further understanding between people, is an act of faith and therefore is an act of love.
From a 1952 interview - Truman Capote: Conversations (1987)