Complex sentence: Like many symbolists, Dujardin believed music to be an expression of interior life, and that interior monologue, being anti-rationalist and anti-intellectual, could point the novel's way toward expressing the unconscious.
Split into simpler sentences: Like many symbolists, Dujardin believed music to be an expression of interior life. In turn, interior monologue, being a-rationalist and anti-intellectual, could point the novel's way toward expressing the unconscious.