Historically, dreams were often seen as profound messages from deities, ancestors, or the spirit world. In ancient Egypt, dream interpreters held significant power, advising pharaohs based on divine omens. The Greeks and Romans believed dreams could predict the future, offer medical diagnoses, or provide guidance, often seeking incubation sleep in temples to receive healing dreams. Indigenous cultures across the globe continue to view dreams as vital spiritual experiences, a bridge between the physical and metaphysical realms, offering insights for communal decisions or personal journeys. From a historical perspective, the scientific inquiry into dreams is relatively recent, emerging prominently with Freud's 'Interpretation of Dreams' at the turn of the 20th century. Before this, the emphasis was less on psychological mechanisms and more on the external source and prophetic nature of dream content. This long history underscores humanity's persistent fascination with the nocturnal world and its perceived power.