(a) objectively, there must be an intention of doing what the Church does (i.e., of performing a sacred rite instituted by Christ, for the minister acts in the name and authority of Christ). Hence a mock sacrament—or even, more probably, a purely external performance with no purpose to enact a sacred rite—does not suffice. But, on the other hand, an unbeliever can administer validly if he really intends to do what Christians do or what Christ commanded to be done. The intention not to do what the Church does was the chief cause of the nullity of Anglican Orders;
(b) subjectively, the intention must be at least virtual, so as to ensure a deliberate act. An actual intention is not necessary, because it is often impossible on account of its difficulty; while an habitual intention is not sufficient, because it does not influence the act so as to make it human (see 2165). The interpretative intention (i.e., a purpose that never existed, but that would presumably have existed, had attention been given the matter) is with greater reason insufficient;
(c) modally, the intention must be such as to make precise the character of the action as a special sacred rite; for just as the matter awaits the form or word to receive the imprint of a sacred significance, so do the ceremonial words themselves look to the internal purpose of the minister for their fixed meaning. Hence, the Sacrament is invalid if the minister’s purpose is indeterminate (e.g., if a priest wills to consecrate ten undesignated hosts out of the hundred contained in a ciborium, or to absolve one undesignated person of a multitude); or if the purpose is self-exclusive (e.g., if a bridegroom has two mutually incompatible intentions, namely, to marry the bride and also to marry her only for a time); or if the purpose is left in suspense (e.g., if a priest makes his absolution depend on future restitution or any other non-existent condition, and most probably also if the minister makes the Sacrament depend on the recipient’s predestination or other such condition known only to God).
2667. Rules on Plurality of Intentions.—(a) When opposite intentions are simultaneous, if one of them is predominant in the minister’s will and not insociable with the Sacrament, that one prevails and the Sacrament is valid; otherwise the Sacrament is null. (b) When opposite intentions are successive, the later prevails over the earlier, unless the earlier was stronger and meant to endure in spite of other intentions, and it has not been recalled expressly by the will.
2668. Requisites for Use of Conditional Intention.—(a) The use must be valid or non-suspensive (2666 e), and hence (Matrimony excepted on account of its special character as a contract) the minister may not confer a Sacrament under a condition _de futuro_. But conditions _de praesenti_ (e.g., “I absolve you, if you are repentant”) or _de praeterito_ (e.g., “I baptize you, if you have not received Baptism”) are valid.
(b) The use of a conditional intention must be lawful, or justified by a sufficient reason. Normally the minister should intend absolutely to give a Sacrament, as the forms of the Sacraments are unconditional. But if the absolute intention would be disrespectful, because there is doubt whether all the requisites for the Sacrament are present, while on the other hand denial of the Sacrament would be harmful because the subject needs it, both disrespect to the Sacrament and harm to the subject are avoided by conditional administration. The doubt spoken of may refer to the recipient (e.g., whether he is living or otherwise capable, whether he is contrite or otherwise disposed) or to the Sacrament (e.g., whether it has been received or received validly, whether the form has been rightly spoken, whether the present matter is valid).
(c) The use of the conditional intention must be legal according to the rules prescribed by the Church. Thus, according to the Ritual the conditional intention in Baptism and Extreme Unction (“_Si non es baptizatus_,” “_Si vivis_”) must be expressed vocally. Moreover, conditional marriages are not permitted as a rule except there be a grave reason and the bishop consents.
2669. Lawful Administration of Sacraments.—Lawful administration of a Sacrament demands, in addition to the conditions for validity (2665-2668), that the minister and his ministry be worthy, for even in the Old Law it was strictly commanded that holy things be treated in a holy manner (Isa., lii. 11; Lev., xxi. xxii). Hence, a person who fulfilled the conditions for validity but who lacked one or other of the qualities mentioned below would perform and confer a true Sacrament, but he would sin more or less seriously on account of the unworthy administration, unless good faith excused him.
(a) The Minister’s Worthiness before God.—The state of grace is required in consecrated ministers when they minister solemnly and _ex officio_ in performing a Sacrament; for they act then as representatives of Christ, who is holy, and exercise most sacred functions which He appointed as means of holiness and which they were ordained to perform holily. The sin of unworthiness is a grave sacrilege. It seems there is _per se_ no grave sin, if the minister is not consecrated (e.g., in lay Baptism), or if the ministry is not _ex officio_ (e.g., in a Baptism of necessity given by a priest but without the solemn ceremonies), or if a Sacrament is not made or performed (e.g., when confession is heard but absolution not given, when Communion is administered, when the Blessed Sacrament is carried). It is generally admitted that there is no grave sin even in a solemn and official performance of a Sacrament, if the Sacrament is urgently necessary and the state of grace cannot be recovered in time; also in the exercise of a function which is not itself a Sacrament (e.g., to be official witness at a marriage or deacon at Mass, to preach, bless, give Minor Orders, chant or say the Office). When the state of grace is necessary for his ministry, one who is in sin must to the best of his ability recover that state by going to confession or at least by making an act of contrition.
(b) The Minister’s Worthiness Before the Church.—Since the Church is the custodian of the Sacraments, these cannot be lawfully performed or administered by those who are under her censure or who have not received her license. The excommunicated and the irregular sin gravely if they administer Sacraments, unless the faithful lawfully request administration from them (see 2683). Only priests are licensed to act as ministers of Baptism, Penance, Extreme Unction and the Eucharist, and the pastor of a place is the authorized minister for that territory; but in case of need even the laity may administer Baptism, a priest other than the pastor may give the Last Sacraments, and the sick may confess to any confessor with due faculties.