/summa/SS/SSIV/SS_Q179:
We must next consider active and contemplative life. This consideration will be fourfold: (1) Of the division of life into active and contemplative; (2) Of the contemplative life; (3) Of the active life; (4) Of the comparison between the active and the contemplative life.
Under the first head there are two points of inquiry:
(1) Whether life is fittingly divided into active and contemplative?
(2) Whether this is an adequate division?