There’s no “saying goodnight” to your brain. Instead, say “good morning”. When you are asleep, your brain is sometimes more active then if you were awake!
When you are awake, you’re thinking about food, school, people, and more…But your brain isn’t at it’s most active state. When you are dreaming, your brain is wide awake and running laps.
Fact in short: your brain is sometimes more active when you sleep than when you’re awake.
Do you dream a lot? What was your dream last night?