The Wisdom of Jesus the Son of Sirach, or Ecclesiasticus 34:7 Kommentar

Concerning this point, Peter, you must understand that there are six kind of dreams. For sometime they proceed of too much fulness or emptiness of the stomach: sometime by illusion: sometime both by thought and illusion: sometime by revelation: and sometime both by thought and revelation. The two first all by experience know to be true: and the four latter we find mentioned in holy scripture. For if dreams did not sometime proceed by illusion from our secret enemy, never would the wise man have said: Dreams have made many to err, and hoping in them have they been deceived: and again: You shall not be soothsayers, nor observe dreams: by which words we see how they are to be detested, that are compared with sooth-sayings. Again, if dreams did not sometime proceed both of thought together with illusion, the wise man would not have said: Dreams follow many cares. And if sometime also they did not come by mystical revelation, Joseph had never known by dream that he should have been exalted above his brethren: neither the Angel would ever in a dream have admonished the spouse of our Lady to fly away with the child into Egypt. Again, if sometime they did not also proceed both from thoughts and divine revelation, never would the prophet Daniel, disputing of Nabuchodonosor's dream, have begun from the root of his former thoughts, saying: Thou, O king, diddest begin to think in thy bed, what should happen in times to come; and he that revealeth mysteries did shew thee what things should come: and a little after: Thou diddest see, and behold as it were a great statue: that great statue and high of stature did stand against thee, &c. Wherefore, seeing Daniel doth with reverence insinuate that the dream should come to pass, and also declareth from what cogitation it did spring, plainly do we learn that dreams sometimes do come both of thought and revelation together. But seeing dreams do grow from such divers roots, with so much the more difficulty ought we to believe them: because it doth not easily appear unto us, from what cause they do proceed. Holy men, indeed, by a certain inward spiritual taste, do discern betwixt illusions and true revelations, by the very voices or representations of the visions themselves: so that they know what they receive from the good spirit, and what they suffer by illusion from the wicked: and therefore, if our mind be not herein very attentive and vigilant, it falleth into many vanities, through the deceit of the wicked spirit: who sometime useth to foretell many true things, that, in the end, he may by some falsehood ensnare our soul.