Humans spend approximately 30% of our lives sleeping. While the body rests, the brain remains remarkably active. In that state of unconsciousness, where are the images and events we perceive as dreams originating from? What does scientific inquiry tell us about this nocturnal phenomenon, and how does the findings intersect with popular cultures and beliefs?
Dreams as Prophetic Visions?
Some people believe that dreams can predict impending events and there are some claims to support this, but can neuroscience help us to unravel the science behind it and shed more light on this intriguing subject?
Historical Significance of Dreams
Throughout human history, sleep has carried profound symbolic meaning with dreams seen as a vital avenue for forecasting the future and understanding aspects of reality. Dreams, once considered a magical domain, were sought after for answers life’s mysteries.
In contemporary times however, our understanding of dream has evolved. Not only that, there is an indescribable ability of dreams to transport us to fantastical realms.
Dreams Becoming Reality
Many individuals claim to have dreamt of events that later occurred in real life. Neuroscientist Sidarta Ribeiro, in his book ‘O Oráculo da Noite,’ claims that dreams echo memories of the dreamers past and reflects on their expectations for the future.

Projections of Desired Futures
In other words, the human brain, leveraging its memory capabilities, uses dreams to project potential outcomes. For example, dreaming of an accident could be a way our minds rehearse such possibilities and enable us to contemplate and better cope with such challenging situations if they do occur.
Then unsurprisingly, how we respond to this neurological help could determine if the events do actually eventually occur or not.
Fortune-Telling or Hypothesis Building?
Let’s consider the scenario of dreaming about that accident for a moment. Dreams are constructed from real experiences we see and feel, and the brain uses them to anticipates probable events. Dreams, in this light, become a tool for hypothesizing about the future. If it does not occur it is discarded, but if it does, it then adds to the myth about dreams accurate predictability.
Relying on dreams as a scientifically precise way of predicting the future is elusive.
Within the realm of dreams, individuals also endeavor to fulfill unattainable desires, both small and significant, that may elude them in real life.
Enter, Sigmund Freud
The father of modern psychology, Sigmund Freud, in his famous book ‘The Interpretation of Dreams,’ adds to the debate by positing that dreams serve as representations of repressed desires, offering a path to the conscious mind. During sleep, he asserts, relaxed social and mental filters let the unconscious express itself freely in the form of dreams.

Common Dream Archetypes
Dreams encompass a vast tapestry of experiences, with three prevalent types: nightmares, pleasant dreams, and being chased dreams. Nightmares evoke fear, pleasant dreams bring joy, and being chased dreams often mirror unfulfilled aspirations.
Unraveling the Unconscious
When we sleep, our mental filters relax, allowing the free uninhibited expression of the unconscious thoughts through the tapestry of our memories. As Freud put it, “All the material that makes up the dream is formed from experience.“
Recollection Techniques
So, remembering our dreams therefore becomes vital especially immediately after waking up from a dream when our recollection is still vivid. Neuroscientist Sidarta Ribeiro recommends writing down the dream promptly and in details, emphasizing that this practice enriches one’s dream life.
Keeping a dream journal, recording thoughts immediately upon waking, proves effective in capturing the essence of the dreams while they are still fresh in memory. Though initially challenging, jotting down the first impressions—feelings, colors, places—can provide valuable insights into our inner life and what our subconscious mind is trying to reveal to us about our true selves and our deepest fears and desires.
“All the material that makes up the dream is formed from experience“
– Sigmund Frieud
In Conclusion
Whether dreams unfold as pleasant fantasies or ominous scenarios, documenting them serves as a reflective practice. Despite this, relying on dreams as a scientifically precise way of predicting the future is elusive. Dream is an enigma. We should neither discard it nor rely exclusively on it, but harness its value as an imprecise guide while we embrace our future with faith, resilience, due care and solid efforts.
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