The history of oneirology may be divided into explanations of the caus
es of dreaming and interpretations of the content of dreams. Because t
hese schools of thought are opposed to each other, the distinction bet
ween them can be used to falsify Kathleen Coburn's claim that Coleridg
e was a forerunner of Freud. Although both sought to bring the unconsc
ious under the control of the conscious, rational mind, their oneirolo
gical approaches nonetheless differed fundamentally. Freud did not rej
ect the etiological explanation of dreams, but his emphasis on unconsc
ious rather than somatic and other external causes placed him at odds
with earlier psychologists and imposed on him a hermeneutic burden of
proof; consisting in establishing that dreams are wish-fulfillments ev
en when they do not appear to be. Furthermore, his theory of symbolism
had strong affinities with both ancient and Romantic oneirocriticism.
Coleridge for his part found the traditional causal explanations of d
reams inadequate, but habitually resorted to them anyway because he co
uld not bring himself to interpret oneiric imagery-perhaps out of fear
of what he might discover about himself.