226. What is the link between the sacraments and the Church?Christ has entrusted the sacraments to his Church. They are the sacraments "of the Church" in a twofold sense: they are "from her" insofar as they are actions of the Church which is the sacrament of Christ's action; and they are "for her" in as much as they build up the Church.
Further reading: CCC 1117 - 1119227. What is the sacramental character?
It is spiritual "
seal" bestowed by the sacraments of Baptism, Confirmation, and Holy Orders. It is a promise and guarantee of divine protection. By virtue of his seal the Christian is configured to Christ, participates in a variety of ways in his priesthood and takes his part in the Church according to different states and functions. He is, therefore, set apart for divine worship and the service of the Church. Because this character is indelible the sacraments that impress it on the soul are received only once in life.
Further reading: CCC 1121