From the Catechism of the Catholic Church
1533 Baptism, Confirmation, and Eucharist are sacraments of Christian initiation. They ground the common vocation of all Christ’s disciples, a vocation to holiness and to the mission of evangelizing the world. They confer the graces needed for the life according to the Spirit during this life as pilgrims on the march towards the homeland.
1534 Two other sacraments, Holy Orders and Matrimony, are directed towards the salvation of others; if they contribute as well to personal salvation, it is through service to others that they do so. They confer a particular mission in the Church and serve to build up the People of God.