Key takeaways
- Mild, positive self-beliefs are normal and linked to motivation and wellbeing.
- Fantasising about an outcome without planning for obstacles tends to reduce effort.
- The healthy version of delulu keeps the big belief and checks it against evidence.
“Delulu is the solulu” started as a joke: if you believe hard enough that your crush likes you, or that you will land the dream job, maybe it will happen. It spread because it captures something real. Most of us run on slightly flattering stories about ourselves, and those stories often help.
Positive illusions are normal
In 1988, psychologists Shelley Taylor and Jonathon Brown published an influential review called “Illusion and Well-Being”. They argued that mentally healthy people tend to hold three mild illusions: they see themselves a bit more positively than others see them, they overestimate how much control they have, and they are more optimistic about their future than the odds justify.
Those illusions, they suggested, are linked to happiness, caring for others and the ability to do productive work. In other words, a little delulu is not a malfunction. It is how many well-adjusted people operate.
Where it stops working
The catch comes from research by psychologist Gabriele Oettingen. Across studies on weight loss, job searches and romantic crushes, people who spent more time indulging in positive fantasies about the outcome often did worse than people who did not. Dreaming felt good and seemed to take the edge off the drive to act.
What worked better was pairing the dream with a clear look at what stands in the way. Oettingen calls this mental contrasting, and we cover it in detail in our guide to manifesting versus planning.
Healthy delulu versus the other kind
| Healthy delulu | Costly delulu |
|---|---|
| “I can probably do this if I work at it.” | “It will happen because I want it.” |
| Updates when feedback comes in | Explains feedback away |
| Comes with a plan and a deadline | Comes with a vision board |
| Risks are small and recoverable | Risks money, health or relationships |
A quick self-check
Ask yourself three questions about any big belief:
- What evidence would change my mind?
- What have I done this week that moves it forward?
- If it does not happen, what does it cost me?
If you can answer all three, your delulu is probably working for you. If the first question makes you uncomfortable, that is worth noticing.
Want a number? Our How Delusional Am I quiz scores your everyday optimism, and the Delusion Score Calculator compares your confidence with your evidence for a specific goal.
A note on the word “delusional”
Online, delulu is a joke about hope. In medicine, delusional disorder is a serious mental health condition involving fixed false beliefs that last at least a month. Nothing on this site diagnoses anything. If you or someone you know is struggling with beliefs that feel out of control, please speak to a doctor or mental health professional.
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