Growing closer to God through prayer.
We make the sign of the cross - first, to put us in mind of the Blessed Trinity; and secondly, to remind us that God the Son died for us on the Cross.
In making the sign of the cross we are reminded of the Blessed Trinity by the words, "In the name of the Father, and of the Son, and of the Holy Spirit".
In making the sign of the cross we are reminded that Christ died for us on the cross by the very form of the cross which we make upon ourselves.