In the Sacrament of Confirmation, the baptized person is "sealed with the gift of the Holy Spirit" and is strengthened for service to the Body of Christ. Pope Francis has explained that during confirmation “through the sacramental sign of anointing with sacred chrism, we receive the gift of the Holy Spirit in order to be more closely conformed to Christ, God’s ‘anointed one.’”
Confirmation deepens our baptismal life that calls us to be missionary witnesses of Jesus Christ in our families, neighborhoods, society, and the world. . . . We receive the message of faith in a deeper and more intensive manner with great emphasis given to the person of Jesus Christ, who asked the Father to give the Holy Spirit to the Church for building up the community in loving service. (USCCB)
“We are also strengthened — ‘confirmed’ — in the grace of our baptism and in our mission of bearing daily witness to Christ and his love,” the Holy Father has said, “this Spirit acts with strength within us, within all people and during one’s whole life,” … “when we receive him in our hearts, Christ makes himself present and takes shape in our lives.”