Columbia subject headings:
Harvard subject headings:
Philosophy and religion in literature.
Religion and literature.
Theology in literature.
Princeton subject headings:
Aesthetics, Modern--20th century.
Aesthetics--Religious aspects--Catholic Church.
Catholic Church and philosophy--History--20th century.
Literature, Modern--20th century--History and criticism--Theory, etc.
Philosophy and religion in literature.
Religion and literature.
Theology in literature.