Why Your Brain Deletes Memories Overnight

“This is going to sound fake… but your brain deletes parts of your life. Every night.

On purpose. And it does this for one reason— speed. Your brain runs

on limited energy. If it kept every memory, decision-making would slow down…

and hesitation used to mean death. So while you sleep, your brain filters information

the same way your phone clears cache— not because it’s useless, but because it’s

in the way. Facts you never use get erased. Emotional moments stay,

because they teach you what to avoid. Your brain isn’t trying to make you happy.

It’s trying to make you fast enough to survive. Follow— your brain respects