Tertullian

“ We declare, then, that dreams are inflicted on us mainly by demons, although they sometimes turn out true and favourable to us. When, however, with the deliberate aim after evil, of which we have just spoken, they assume a flattering and captivating style, they show themselves proportionately vain, and deceitful, and obscure, and wanton, and impure. ”

“ It was, indeed by an inspiration from God that Nebuchadnezzar dreamt his dreams; [3] and almost the greater part of mankind get their knowledge of God from dreams. Thus it is that, as the mercy of God super-abounds to the heathen, so the temptation of the evil one encounters the saints, from whom he never withdraws his malignant efforts to steal over them as best he may in their very sleep, if unable to assault them when they are awake. The third class of dreams will consist of those which the soul itself apparently creates for itself from an intense application to special circumstances. ”

“ Then must this class of dreams be abandoned to the action of nature, reserving for the soul, even when in the ecstatic condition, the power of enduring whatever incidents befall it? Those, moreover, which evidently proceed neither from God, nor from diabolical inspiration, nor from the soul, being beyond the reach as well of ordinary expectation, usual interpretation, or the possibility of being intelligibly related, will have to be ascribed in a separate category to what is purely and simply the ecstatic state and its peculiar conditions. ”