The chief points of importance in the detailed instructions under twenty-one heads prefixed to the rite in the _Rituale_ may thus be briefly summarized: (1) The priest or exorcist should be of mature age, humble, of blameless life, courageous, of experience, and well-attested prudence. It is fitting he should prepare himself for his task by special acts of devotion and mortification, by fervent prayer and by fasting (S. Matthew xvii. 20). (2) He must be a man of scholarship and learning, a systematic student and well versed in the latest trends and developments of psychological science. (3) Possession is not lightly to be taken for granted. Each case is to be carefully examined and great caution to be used in distinguishing genuine possession from certain forms of disease. (4) He should admonish the possessed in so far as the latter is capable, to dispose himself for the exorcism by prayer, fasting, by confession, and Holy Communion, and while the rite is in progress he must excite in his heart a most lively faith in the goodness of God, and perfect resignation to the divine will. (5) The exorcism should take place in the Church, or some other sacred place, if convenient, but no crowd of gazers must be suffered to assemble out of mere curiosity. There should, however, be a number of witnesses, grave and devout persons of standing, eminent respectability, and acknowledged probity, not prone to idle gossip, but discreet and silent. If on account of sickness or for some legitimate reason the exorcism takes place in a private house it is well that members of the family should be present; especially is this enjoined, as a measure of precaution, if the subject be a woman. (6) If the patient seems to fall asleep, or endeavours to hinder the exorcist in any way during the rite he is to continue, if possible with greater insistence, for such actions are probably a ruse to trick him. (7) The exorcist, although humble and having no reliance upon himself alone, is to speak with command and authority, and should the patient be convulsed or tremble, let him be more fervent and more insistent; the prayers and adjurations are to be recited with great faith, a full and assured consciousness of power. (8) Let the exorcist remember that he uses the words of Holy Scripture and Holy Church, not his own words and phrases. (9) All idle and impertinent questioning of the demon is to be avoided, nor should the evil spirit be allowed to speak at length unchecked and unrebuked. (10) The Blessed Sacrament is not to be brought near the body of the obsessed during exorcism for fear of possible irreverence; Relics of the Saints may be employed, but in this case every care must be most scrupulously observed that all due veneration be paid to them; the Crucifix and Holy Water are to be used. (11) If expulsion of the evil spirit, who will often prove obstinate, is not secured at once, the rite should be repeated as often as need be.