Water represents healing and rebirth. It is at Baptism that the stain of original sin is washed away. In receiving Communion, Catholics physically receive the body of Jesus Christ in the form of a host. The Catholic Church teaches that during consecration, the bread and wine are changed into the body and blood of Jesus Christ, though they may retain the physical accidents of bread and wine. When we accept the Eucharist, we are physically accepting Jesus Christ into our bodies and our lives.
Confirmation is the final sacrament of initiation.
Since the Church believes in infant Baptism, it is important to confirm a belief in Jesus Christ and his Church later on. When an infant is baptized, the infant's parents and godparents affirm that they will raise the child in the Church. They express a belief in Christ for the child.