Further insight into baptism as preparation to do battle with the devil

From the original Rite of Infant Baptism:

We receive this child (person) into the congregation of Christ's flock; and do sign him with the sign of the cross, in token that hereafter he shall not be ashamed to confess the faith of Christ crucified, and manfully to fight under his banner, against sin, the world, and the devil; and to continue Christ's faithful soldier and servant unto life's end.

(from Peter Gomes, The Scandalous Gospel of Jesus, page 119)