Most of these answers come from the good, old Baltimore Catechism and the Catechism of the Catholic Church 1. Confirmation is a sacrament through which we receive the Holy Ghost to make us strong and perfect Christians and soldiers of Jesus Christ. In baptism we are made Christians, but we are not very strong until we receive the Holy Ghost in Confirmation. The Apostles were very fearful, hiding out, until the Holy Ghost came to them at Pentecost. Then they went out to preach the gospel boldly, and suffered martyrdom bravely.
Confirmation is like a completion of baptism.
These Sacraments are necessary for saving grace. And he shall be filled with the spirit of the fear of the Lord, He shall not judge according to the sight of the eyes, nor reprove according to the hearing of the ears. Understanding - to know more clearly the mysteries of our Faith. Counsel - warns us of the deceits of the devil, and of dangers to salvation. Fortitude - the strength to do the will of God.