According to the institutional authority of the Catholic Church, individuals must accept certain principles, go through certain orientation and membership procedures (such as confirmation and confession), and submit to certain authorities, such as priests, bishops, and the Pope.
Give a meaning of sacrament as it applies to church.
Sacraments in the context of a worship community are often defined as the invisible made visible, or how the divine makes itself physically manifest on earth. The most obvious symbol of this is transubstantiation in the Catholic Mass, where God is made present in the form of the host, through the ritual process evident during the ceremony.
In other Christian traditions, such as Quakerism, the spirit may be spontaneously present during a communal and nonhierarchical worship ceremony, when it moves ordinary believers to speak. The church during the context of any worship ceremony is supposed to provide a unique space and time for the sacred to become present in the world, even if the traditions specific concept of what is a sacrament which may vary and not be called a sacrament.