Objection 2: Further, the unction itself is a sacrament, for it would be absurd to say that the oil is a sacrament. But there are several unctions. Therefore there are several sacraments.
Objection 3: Further, one sacrament should be performed by one minister. But the case might occur that Extreme Unction could not be conferred by one minister: thus if the priest die after the first unction, another priest would have to proceed with the others. Therefore Extreme Unction is not one sacrament.
On the contrary, As immersion is in relation to Baptism, so is unction to this sacrament. But several immersions are but one sacrament of Baptism. Therefore the several unctions in Extreme Unction are also one sacrament.
Further, if it were not one sacrament, then after the first unction, it would not be essential for the perfection of the sacrament that the second unction should be performed, since each sacrament has perfect being of itself. But that is not true. Therefore it is one sacrament.
I answer that, Strictly speaking, a thing is one numerically in three ways. First, as something indivisible, which is neither actually nor potentially several---as a point, and unity. Secondly, as something continuous, which is actually one, but potentially several---as a line. Thirdly, as something complete, that is composed of several parts---as a house, which is, in a way, several things, even actually, although those several things go together towards making one. In this way each sacrament is said to be one thing, in as much as the many things which are contained in one sacrament, are united together for the purpose of signifying or causing one thing, because a sacrament is a sign of the effect it produces. Hence when one action suffices for a perfect signification, the unity of the sacrament consists in that action only, as may be seen in Confirmation. When, however, the signification of the sacrament can be both in one and in several actions, then the sacrament can be complete both in one and in several actions, even as Baptism in one immersion and in three, since washing which is signified in Baptism, can be completed by one immersion and by several. But when the perfect signification cannot be expressed except by means of several actions, then these several actions are essential for the perfection of the sacrament, as is exemplified in the Eucharist, for the refreshment of the body which signifies that of the soul, can only be attained by means of meat and drink. It is the same in this sacrament, because the healing of the internal wounds cannot be perfectly signified save by the application of the remedy to the various sources of the wounds. Hence several actions are essential to the perfection of this sacrament.
Reply to Objection 1: The unity of a complete whole is not destroyed by reason of a diversity of matter or form in the parts of that whole. Thus it is evident that there is neither the same matter nor the same form in the flesh and in the bones of which one man is composed. In like manner too, in the sacrament of the Eucharist, and in this sacrament, the diversity of matter and form does not destroy the unity of the sacrament.
Reply to Objection 2: Although those actions are several simply, yet they are united together in one complete action, viz. the anointing of all the external senses, whence arises the infernal malady.
Reply to Objection 3: Although, in the Eucharist, if the priest die after the consecration of the bread, another priest can go on with the consecration of the wine, beginning where the other left off, or can begin over again with fresh matter, in Extreme Unction he cannot begin over again, but should always go on, because to anoint the same part a second time would produce as much effect as if one were to consecrate a host a second time, which ought by no means to be done. Nor does the plurality of ministers destroy the unity of this sacrament, because they only act as instruments, and the unity of a smith's work is not destroyed by his using several hammers.
Whether this sacrament was instituted by Christ?
Objection 1: It would seem that this sacrament was not instituted by Christ. For mention is made in the Gospel of the institution of those sacraments which Christ instituted, for instance the Eucharist and Baptism. But no mention is made of Extreme Unction. Therefore it was not instituted by Christ.
Objection 2: Further, the Master says explicitly (Sent. iv, D, 23) that it was instituted by the apostles. Therefore Christ did not institute it Himself.
Objection 3: Further, Christ showed forth the sacraments which He instituted, as in the case of the Eucharist and Baptism. But He did not bestow this sacrament on anyone. Therefore He did not institute it Himself.
On the contrary, The sacraments of the New Law are more excellent than those of the Old Law. But all the sacraments of the Old Law were instituted by God. Therefore much more do all the sacraments of the New Law owe their institution to Christ Himself.
Further, to make an institution and to remove it belongs to the same authority. Now the Church, who enjoys the same authority in the successors of the apostles, as the apostles themselves possessed, cannot do away with the sacrament of Extreme Unction. Therefore the apostles did not institute it, but Christ Himself.
I answer that, There are two opinions on this point. For some hold that this sacrament and Confirmation were not instituted by Christ Himself, but were left by Him to be instituted by the apostles; for the reason that these two sacraments, on account of the plenitude of grace conferred in them, could not be instituted before the mission of the Holy Ghost in perfect plenitude. Hence they are sacraments of the New Law in such a way as not to be foreshadowed in the Old Law. But this argument is not very cogent, since, just as Christ, before His Passion, promised the mission of the Holy Ghost in His plenitude, so could He institute these sacraments.
Wherefore others hold that Christ Himself instituted all the sacraments, but that He Himself published some, which present greater difficulty to our belief, while he reserved some to be published by the apostles, such as Extreme Unction and Confirmation. This opinion seems so much the more probable, as the sacraments belong to the foundation of the Law, wherefore their institution pertains to the lawgiver; besides, they derive their efficacy from their institution, which efficacy is given them by God alone.
Reply to Objection 1: Our Lord did and said many things which are not related in the Gospel. For the evangelists were intent on handing down chiefly those things that were necessary for salvation or concerned the building of the ecclesiastical edifice. Hence they related the institution by Christ of Baptism, Penance, the Eucharist and orders, rather than of Extreme Unction and Confirmation, which are not necessary for salvation, nor do they concern the building or division of the Church. As a matter of fact however an anointing done by the apostles is mentioned in the Gospel ( Mk. 6:13 ) where it is said that they "anointed the sick with oil."
Reply to Objection 2: The Master says it was instituted by the apostles because its institution was made known to us by the teaching of the apostles.
Reply to Objection 3: Christ did not show forth any sacrament except such as He received by way of example: but He could not be a recipient of Penance and Extreme Unction, since there was no sin in Him: hence He did not show them forth.
Whether olive oil is a suitable matter for this sacrament?
Objection 1: It would seem that olive oil is not a suitable matter for this sacrament. For this sacrament is ordained immediately to the state of incorruption. Now incorruption is signified by balsam which is contained in chrism. Therefore chrism would be a more suitable matter for this sacrament.
Objection 2: Further, this sacrament is a spiritual healing. Now spiritual healing is signified by the use of wine, as may be gathered from the parable of the wounded man ( Lk. 10:34 ). Therefore wine also would be more suitable a matter for this sacrament.
Objection 3: Further, where there is the greater danger, the remedy should be a common one. But olive oil is not a common remedy, since the olive is not found in every country. Therefore, since this sacrament is given to the dying, who are in the greatest danger, it seems that olive oil is not a suitable matter.
On the contrary, oil is appointed ( James 5:14 ) as the matter of this sacrament. Now, properly speaking, oil is none but olive oil. Therefore this is the matter of this sacrament.
Further, spiritual healing is signified by anointing with oil, as is evident from Is. 1:6 where we read: " . . . swelling sores: they are not . . . dressed nor fomented with oil." Therefore the suitable matter for this sacrament is oil.