Macrobeus, that writ the avisioun
In Affrike of the worhty Cipioun,
Affermeth dremes, and seith that they been
Warnynge of thynges, that men after seen.
– Geoffrey Chaucer
The Canterbury Tales, The Nun’s Priest’s Tale. Dreams are warnings of things that men have later seen, says Chauntecleer, citing the authority of Roman Macrobius who wrote about the great Roman Scipio’s dreams.