It would be possible farther to illustrate Luther's conception of the Evil Principle by quoting many of his specific sayings about diabolic agency. It would be found from these that his conception was that of a being to whom evil of all kinds was dear. The Devil with him was a meteorological agent. Devils, he said, are in woods, and waters, and dark poolly places, ready to hurt passers-by; there are devils also in the thick black clouds, who cause hail and thunders and lightnings, and poison the air and the fields and the pastures. "When such things happen, philosophers say they are natural, and ascribe them to the planets, and I know not what all." The Devil he believed also to be the patron of witchcraft. The Devil, he said, had the power of deceiving the senses, so that one should swear he heard or saw something while really the whole was an illusion. The Devil also was at the bottom of dreaming and somnambulism. He was likewise the author of diseases. "I hold," said Luther, "that the Devil sendeth all heavy diseases and sicknesses upon people." Diseases are, as it were, the Devil striking people; only, in striking, he must use some natural instrument, as a murderer uses a sword. When our sins get the upper hand, and all is going wrong, then the Devil must be God's hangman, to clear away obstructions and to blast the earth with famines and pestilences. Whatsoever procures death, that is the Devil's trade. All sadness and melancholy come of the Devil. So does insanity; but the Devil has no farther power over the soul of a maniac. The Devil works in the affairs of nations. He looks always upward, taking an interest in what is high and pompous; he does not look downward, taking little interest in what is insignificant and lowly. He likes to work on the great scale, to establish an influence over the central minds which manage public affairs. The Devil is also a spiritual tempter. He is the opponent of the Divine grace in the hearts of individuals. This was the aspect of the doctrine of Satanic agency which was most frequent in preaching; and, accordingly, Luther's propositions on the point are very specific. He had ascertained the laws of Satanic operation upon the human spirit. The Devil, he said, knows Scripture well, and uses it in argument. He shoots fearful thoughts, which are his fiery darts, into the hearts of the godly. The Devil is acquainted even with those mysterious enjoyments, those spiritual excitements, which the Christian would suppose a being like him must be ignorant of. "What gross inexperienced fellows," Luther says, "are those Papist commentators! They are for interpreting Paul's 'thorn in the flesh' to be merely fleshly lust; because they know no other kind of tribulation than that." But, though the Devil has great power over the human mind, he is limited in some respects. He has no means, for instance, of knowing the thoughts of the faithful until they give them utterance. Again, if the Devil be once