1st part. Structure : the symbolic order. The human subject in language and culture ; The Christian subject in the language and culture of the church ; Relations between the elements of the structure -- 2nd part. One element of the structure : the sacraments as ritual symbols. Symbol ; The language of rite -- 3rd part. Functioning of the structure : symbolic exchange. Symbolic exchange ; Symbolic exchange between humanity and God : the eucharistic prayer -- 4th part. Sacramental mystery and trinitarian mystery. The sacraments of Christ's Passover in the spirit -- 5th part. Pastoral applications. Managing the request for rites of passage.