The sacrament of confirmation completes the sacrament of baptism. If baptism is the sacrament of re-birth to a new and supernatural life, confirmation is the sacrament of maturity and coming of age.
Philip went down to a city of Samar′ia, and proclaimed to them the Christ. And the multitudes with one accord gave heed to what was said by Philip, when they heard him and saw the signs which he did.
Now when the apostles at Jerusalem heard that Samar′ia had received the word of God, they sent to them Peter and John, who came down and prayed for them that they might receive the Holy Spirit; for it had not yet fallen on any of them, but they had only been baptized in the name of the Lord Jesus. Then they laid their hands on them and they received the Holy Spirit. Acts 8:5-6; 14-17
Click here: Catechism of the Catholic Church 1285