Abstract

Dreams played a vital role in Graeco-Roman antiquity at all levels of society. Interpreters of prophetic dreams thrived at marketplaces and at religious festivals. Physicians used dreams to facilitate diagnosis. Philosophers talked of dreams revealing one's moral character and emotional dispositions. Many who studied dreams developed rich and elaborate accounts of the various sorts of dreams and their formation. All of this bespeaks a science of dreams in antiquity. Did these ancients, by a thorough examination of the content of dreams and their attendant circumstances, develop criteria for distinguishing the kinds or functions of dreams and, if so, were these criteria empirically reliable? I attempt to answer these questions chiefly through an evaluation of ancient Graeco-Roman "oneirology" in the works of eight different Graeco-Roman oneirologists, especially philosophers and natural scientists, from Homer to Synesius. ;First, I argue that Homer's famous reference to two gates of dreams led subsequent thinkers to believe in prophetic and nonprophetic dreams. Additionally, the two gates engendered a practical approach to dreams that had a lasting impact on Graeco-Roman antiquity, especially through interpreters of prophetic dreams. Yet, as interpreters of dreams prospered, critics challenged the validity of their art. Ultimately, I argue that the interpreters' responses to their critics were unavailing. ;Moreover, the emergence of the belief in an agentive soul around the fifth century B.C. paved the way for psychophysiological accounts of dreams. Philosophers and physicians thereafter begin to explore nonprophetic meanings of dreams--like moral, psychological, or somatic meanings. Some philosophers rejected the notion of prophecy through dreams altogether, while many essayed to ground prophetic dreams by giving them psychophysiological explanations like other dreams. In general, those oneirologists who tried to give all dreams a psychophysiological explanation bypassed the problem of differentiating dreams by positing, strictly speaking, only one kind of dream--though committing themselves to a plurality of functions for them. ;In summary, I argue that the ancient Graeco-Roman oneirology--as a thorough admixture of the practical, Homeric approach to dreams and the psychogenetic approach--was an inseparable blend of literary fancy and respectable science