This preliminary “call to service” must be distinguished from the actual enlistment in the Christian army at Baptism, in anticipation of which Cyril prays for his hearers that God “may enlist them in His service, and put on them the armour of righteousness Ib. § 17..”  The same metaphorical language in reference to the Christian warfare recurs in many passages See Cat. i. 3; iii. 3, 13; iv. 36, xvii. 36; xxi. 4..