1265–1273 · Thomas Aquinas, Summa Theologica II-II, q. 95, a. 8, co.
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. OBJ[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.