Columbia subject headings:
Contradiction--History.
Hegel, Georg Wilhelm Friedrich, 1770-1831.
Luther, Martin, 1483-1546.
Harvard subject headings:
Contradiction--History.
Hegel, Georg Wilhelm Friedrich, 1770-1831
Luther, Martin, 1483-1546
Princeton subject headings:
Contradiction.
Dialectic.
Hegel, Georg Wilhelm Friedrich, 1770-1831.
Luther, Martin, 1483-1546.
Spirit.