Columbia subject headings:
Nietzsche, Friedrich Wilhelm, 1844-1900.
Schopenhauer, Arthur, 1788-1860.
Sympathy.
Harvard subject headings:
Nietzsche, Friedrich Wilhelm, 1844-1900
Schopenhauer, Arthur, 1788-1860
Sympathy.
Princeton subject headings:
Nietzsche, Friedrich Wilhelm, 1844-1900--Christianity.
Schopenhauer, Arthur, 1788-1860.
Values.