"Be sealed with the Gifts of the Holy Spirit."
The Catechism tells us that Confirmation “is necessary for the completion of baptismal grace,” because by it, “the baptized are more perfectly bound to the Church and are enriched with a special strength of the Holy Spirit.” They “share more completely in the mission of Jesus Christ and the fullness of the Holy Spirit with which He is filled, so that their lives may give off the ‘aroma of Christ.’”
The words of the bishop, “Be sealed with the Gifts of the Holy Spirit,” are an echo of Christ’s words to the apostles after the Resurrection, “Receive the Holy Spirit,” reminding us that Christ has poured out the same Spirit and called us to the same mission He entrusted to His first disciples. The bishop anoints the confirmandi’s head. With this seal, he/she is fully confirmed, or initiated, into the faith, and is left with an even stricter obligation to share and defend the faith because of the gift he/she has received. This seal leaves a permanent stain on the soul, marking the person's total belonging to Christ.
Useful Sacrament of Confirmation links: