1 Cor. 3:1-2
1 And I, brethren, could not speak unto you as unto spiritual, but as unto carnal, even as unto babes in Christ.
2 I have fed you with milk, and not with meat: for hitherto ye were not able to bear it, neither yet now are ye able.
In the Roman Catholic Church, Confirmation is related to the laying on of hands. When a person is an infant, he can receive Baptism, although he doesn't understand it, because he has a soul and that soul needs salvation. As a person gets older, they can and should grow in faith. You would have something to worry about if you didn't show any increase in maturity over a significant span of time in your life. Confirmation affirms and imparts responsibility for one's actions. A very small child doesn't really understand right and wrong; therefore he or she is not yet expected to go to Confession. As one gets older and acquires the ability to reason, he will also be more subject to temptation, and therefore needs ever more protection under the Holy Spirit. This is why he receives a 'fresh outpouring' of the Holy Spirit and is strengthened by the sacraments of Confession and Confirmation. Even the Apostles, who received the Holy Spirit at Pentecost, later prayed for a fresh outpouring. Human beings are weak; we need to constantly re-immerse ourselves in God's grace. This is why the Church, in its duty to act out God's mercy, offers people the help and consolation of the sacraments throughout their lives. Our connection to God does not end at Baptism; it only begins.