I. The architect of the universe (corresponding to the Summa theologica IA) 1941.-II. The pursuit of happiness (corresponding to the Summa theologica IA IIAE) 1938.-III. The fullness of life (corresponding to the Summa theologica IIA IIAE) 1940.-IV. The way of life (corresponding to the Summa theologica IIIA and supplement) 1942.