I can't function without sleep or can I?
- Jorge Marten Groen
- Jul 22, 2025
- 2 min read
Updated: Feb 18

Many people with sleep problems say: "I really can't function if I don't get eight hours of sleep." That sounds like a law of nature - as if your brain and body simply shut down when they don’t get enough sleep.
Words are powerful. What you think and say directly impacts how you feel and what you do. This isn’t some vague idea — it’s a scientifically backed principle from cognitive behavioral therapy (CBT).
If your belief is: "I must sleep to survive the day", then your brain enters stress mode the moment you find yourself awake at night. Your heart rate increases, your muscles tense up, and your body gets ready for action — not rest. And it’s precisely that that makes sleep even more difficult.
Scientific research shows that negative sleep beliefs, like "I can’t function without eight hours of sleep," contribute to:
More stress and tension in bed
Worrying about sleep
Poorer sleep quality
Adjust your beliefs and sleep better
The good news? It works the other way around too! People who adjust their beliefs — you don’t have to trick yourself - often experience less pressure, sleep better, and feel more resilient during the day.
During my own period of insomnia, I often found peace in the thought: "Sooner or later, I will fall asleep." For you, that might be something different. Maybe one of these thoughts can help you:
I’m tired, but I’ve gotten through this before.
I don’t need to feel perfect to function well.
My body knows what it needs - I don’t have to force it.
Sleep is not a performance. You can’t force it, only invite it. The less pressure you put on yourself to sleep well, the greater the chance it will happen.



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