Your mind is a messy attic…

There is a ton of stuff being stored up there and you can't always access what you want.

With objects, we can mentally offload information onto them, allowing us to see, rearrange, and even play with them, providing new perspectives and a deeper understanding. You also get benefit of externalization.

On top of these benefits, we get something called detachment gain. According to Daniel Reisberg, this is the cognitive benefit we receive from putting a bit of distance between ourselves and the content of our minds