Columbia subject headings:
Harvard subject headings:
Heine, Heinrich, 1797-1856--Criticism and interpretation.
Princeton subject headings:
Christianity--Controversial literature--History and criticism.
Christianity--Essence, genius, nature.
Heine, Heinrich, 1797-1856--Contributions in history of philosophy.
Heine, Heinrich, 1797-1856--Religion.
Philosophy, German--Historiography--History--19th century.