Why We Make the Sign of the Cross
626 By the sign of the holy Cross, the Christian professes faith in the Most Holy Trinity and the Incarnation of God’s Son. We make the sign of the Cross with our right hand, devoutly and without haste, pronouncing the words, “In the name of the Father, and of the Son, and of the Holy Spirit. Amen.” Joining the first three fingers of our hand is a sign of our profession of faith in the Holy Trinity, while bending the remaining two to the palm of the hand signifies our confession of two natures - divine and human - in the incarnate Son of God. Signing ourselves crosswise, from the forehead to the breast and from the right
shoulder to the left, we profess the Paschal Mystery of Christ - his dying and rising. Every time we sign ourselves with the holy Cross, saying “In the name of the Father, and of the Son, and of the Holy Spirit,” we profess that our salvation, accomplished on the cross by Jesus Christ, is the work of the Holy Trinity.