XVII. (92) But some persons who have slain others with swords, or spears, or darts, or clubs, or stones, or something of that kind, may possibly have done so without any previous design, and without having for some time before planned this deed in their hearts, but may have been excited at the moment, yielding to passion more powerful than their reason, to commit the homicide; so that it is but half a crime, inasmuch as the mind was not for some long time before occupied by the pollution. (93) But there are others also of the greatest wickedness, men polluted both in hands and mind, who, being sorcerers and poisoners, devoting all their leisure and all their solitude to planning seasonable attacks upon others, who invent all kinds of contrivances and devices to bring about calamities on their neighbours. (94) On which account, Moses commands that poisoners and sorceresses shall not be allowed to live one day or even one hour, but that they shall be put to death the moment that they are taken, no pretext being for a moment allowed them for putting off or delaying their punishment. For those who attack one openly and to one's face, any body may guard against; but of those who plot against one secretly, and who disguise their attacks by the concealed approaches of poison, it is not easy to see the cunning beforehand. (95) It is necessary, therefore, to anticipate them, inflicting upon them that death which other persons would else have suffered by their means. And again, besides this, he who openly slays a man with a sword, or with any similar weapon, can only kill a few persons at one time; but one who mixes and compounds poisonous drugs with food, may destroy innumerable companies at once who have no suspicion of his treachery. (96) Accordingly, it has happened before now that very numerous parties of men who have come together in good fellowship to eat of the same salt and to sit at the same table, have suffered at such a time of harmony things wholly incompatible with it, being suddenly killed, and have thus met with death instead of feasting. On which account it is fitting that even the most merciful, and gentle, and moderate of men should approve of such persons being put to death, who are all but the same as murderers who slay with their own hand; and that they should think it consistent with holiness, not to commit their punishment to others, but to execute it themselves. (97) For how can it by anything but a most terrible evil for any one to contrive the death of another by that food which is given as the cause of life, and to work such a change in that which is nutritious by nature as to render it destructive; so that those who, in obedience to the necessities of nature, have recourse to eating and drinking, having no previous idea of any treachery, take destructive food as though it were salutary? (98) Again, let those persons meet with the same punishment who, though they do not compound drugs which are actually deadly, nevertheless administer such as long diseases are caused by; for death is often a lesser evil than diseases; and especially than such as extend over a long time and have no fortunate or favourable end. For the illnesses which arise from poisons are difficult to be cured, and are often completely incurable. (99) Moreover, in the case of men who have been exposed to machinations of this kind, it often happens that diseases of the mind ensue which are worse even than the afflictions of the body; for they are often attacked by delirium and insanity, and intolerable frenzy, by means of which the mind, the greatest blessing which God has bestowed upon mankind, is impaired in every possible manner, despairing of any safety or cure, and so is utterly removed from its seat, and expelled, as it were, leaving in the body only the inferior portion of the soul, namely, its irrational part, of which even beasts partake, since every person who is deprived of reason, which is the better part of the soul, is changed into the nature of a beast, even though the characteristics of the human form remain.