It is immediately clear that the Christian hope focuses on the coming of the Lord (15), which Paul here calls the Parousia. Although this word’s usual meaning is simply either a ‘presence’ or a ‘coming’, BAGD explains that it was used ‘in a special technical sense’ of Christ, and that this use had a double background. On the one hand, the word served as a cult expression for the coming of a hidden divinity, who makes his presence felt by a revelation of his power
Page 97