I answer that, As stated above (Article [3]), sortilege consists, properly speaking, in doing something, that by observing the result one may come to the knowledge of something unknown. If by casting lots one seeks to know what is to be given to whom, whether it be a possession, an honor, a dignity, a punishment, or some action or other, it is called "sortilege of allotment"; if one seeks to know what ought to be done, it is called "sortilege of consultation"; if one seeks to know what is going to happen, it is called "sortilege of divination." Now the actions of man that are required for sortilege and their results are not subject to the dispositions of the stars. Wherefore if anyone practicing sortilege is so minded as though the human acts requisite for sortilege depended for their result on the dispositions of the stars, his opinion is vain and false, and consequently is not free from the interference of the demons, so that a divination of this kind is superstitious and unlawful.
Apart from this cause, however, the result of sortilegious acts must needs be ascribed to chance, or to some directing spiritual cause. If we ascribe it to chance, and this can only take place in "sortilege of allotment," it does not seem to imply any vice other than vanity, as in the case of persons who, being unable to agree upon the division of something or other, are willing to draw lots for its division, thus leaving to chance what portion each is to receive.
If, on the other hand, the decision by lot be left to a spiritual cause, it is sometimes ascribed to demons. Thus we read (Ezech. 21:21) that "the king of Babylon stood in the highway, at the head of two ways, seeking divination, shuffling arrows; he inquired of the idols, and consulted entrails": sortilege of this kind is unlawful, and forbidden by the canons.
Sometimes, however, the decision is left to God, according to Prov. 16:33, "Lots are cast into the lap, but they are disposed of by the Lord": sortilege of this kind is not wrong in itself, as Augustine declares [*Enarr. ii in Ps. xxx, serm. 2; cf. Objection [1]].
Yet this may happen to be sinful in four ways. First, if one have recourse to lots without any necessity: for this would seem to amount to tempting God. Hence Ambrose, commenting on the words of Lk. 1:8, says: "He that is chosen by lot is not bound by the judgment of men." Secondly, if even in a case of necessity one were to have recourse to lots without reverence. Hence, on the Acts of the Apostles, Bede says (Super Act. Apost. i): "But if anyone, compelled by necessity, thinks that he ought, after the apostles' example, to consult God by casting lots, let him take note that the apostles themselves did not do so, except after calling together the assembly of the brethren and pouring forth prayer to God." Thirdly, if the Divine oracles be misapplied to earthly business. Hence Augustine says (ad inquisit. Januar. ii; Ep. lv): "Those who tell fortunes from the Gospel pages, though it is to be hoped that they do so rather than have recourse to consulting the demons, yet does this custom also displease me, that anyone should wish to apply the Divine oracles to worldly matters and to the vain things of this life." Fourthly, if anyone resort to the drawing of lots in ecclesiastical elections, which should be carried out by the inspiration of the Holy Ghost. Wherefore, as Bede says (Super Act. Apost. i): "Before Pentecost the ordination of Matthias was decided by lot," because as yet the fulness of the Holy Ghost was not yet poured forth into the Church: "whereas the same deacons were ordained not by lot but by the choice of the disciples." It is different with earthly honors, which are directed to the disposal of earthly things: in elections of this kind men frequently have recourse to lots, even as in the distribution of earthly possessions.
If, however, there be urgent necessity it is lawful to seek the divine judgment by casting lots, provided due reverence be observed. Hence Augustine says (Ep. ad Honor. ccxxviii), "If, at a time of persecution, the ministers of God do not agree as to which of them is to remain at his post lest all should flee, and which of them is to flee, lest all die and the Church be forsaken, should there be no other means of coming to an agreement, so far as I can see, they must be chosen by lot." Again he says (De Doctr. Christ. xxviii): "If thou aboundest in that which it behooves thee to give to him who hath not, and which cannot be given to two; should two come to you, neither of whom surpasses the other either in need or in some claim on thee, thou couldst not act more justly than in choosing by lot to whom thou shalt give that which thou canst not give to both."
This suffices for the Reply to the First and Second Objections.