What does the Sign of the Cross symbolize?

The Sign of the Cross is a profession of faith—faith in the Holy Trinity, Father, Son, and Holy Spirit, faith in the Incarnation, and in our Redemption on the Cross. When used while blessing oneself with Holy Water, it recalls our baptism into Christ and the Indwelling of the Trinity within us. It is also a powerful sacramental that protects against the Evil One, and evil in general.