Why do we forget things even when they seem important to us?

We forget things even when they seem important because our brain has to choose what stays and what goes.

Imagine your toy box is full of toys, each one represents a memory. When you play with a new toy, it gets put on top of the pile. The older toys might be pushed down or even tucked away in the back. That’s like how your brain works: new memories are easier to remember because they’re right there, but older ones can slip away if they're not used often.

Think about your favorite cookie, you know exactly where it is in the jar, and you eat it every day. But if you try a new flavor one day and forget about your favorite, it might get lost in the jar, buried under other cookies. You still love it, but you don’t think of it as much.

Your brain is like a backpack that can only hold so many toys at once. If it gets too full, it has to make space, and sometimes it lets go of things that seem important, just because they're not being used right now.