Man and Sin by Piet Schoonenberg (1964) 2.3 CG

Summary of text [comment] page 82

[At this point, ‘concupiscence’ is a word supported by two oppositions, one belonging to Church doctrine and one belonging to Schoonenberg.

The technical difference may be described, using the Greek opposition, as follows:

For Church doctrine, ‘flesh’ is different than ‘reason’. ‘Flesh’ is subject to ‘the state of being with Cupid (a pagan god of desire)’. The fancy word for this state is ‘concupiscence’.

For Schoonenberg’s speculation, ‘flesh and reason’ are distinct but inseparable. Both are different from ‘spirit’. Both ‘flesh and reason’ are subject to concupiscence. Concupiscence encompasses both material and immaterial desires, as well as personal and social conditions.]