Columbia subject headings:
Ethics--Early works to 1800.
Happiness--Early works to 1800.
Intellect--Early works to 1800.
Harvard subject headings:
Ethics, Medieval.
Ethics--Early works to 1800
Happiness--Early works to 1800
Intellect--Early works to 1800
Princeton subject headings:
Aristotle--Influence.
Happiness--Early works to 1800.
Intellect--Early works to 1800.
Intellectual life--Early works to 1800.
Philosophy, Medieval.