Tertullian

“ They say that dreams are more sure and clear when they happen towards the end of the night, because then the vigour of the soul emerges, and heavy sleep departs. As to the seasons of the year, dreams are calmer in spring, since summer relaxes, and winter somehow hardens, the soul; while autumn, which in other respects is trying to health, is apt to enervate the soul by the lusciousness of its fruits. ”

“ But, generally speaking, dreams will be under control of a man’s will, if they be capable of direction at all; for we must not examine what opinion on the one hand, and superstition on the other, have to prescribe for the treatment of dreams, in the matter of distinguishing and modifying different sorts of food. As for the superstition, we have an instance when fasting is prescribed for such persons as mean to submit to the sleep which is necessary for receiving the oracle, in order that such abstinence may produce the required purity ”

“ But however this be, I take it that it all amounts to ingenious conjecture rather than certain proof (although the author of the conjecture be no less a man than Plato) ; [2] and possibly all may be no other than the result of chance. ”