Forgetting is Key to a Healthy Mind (scientificamerican.com)

Hitting a paywall

In a nutshell: "Big smile? Short memory."

EDIT: changed punctuation. i think it comes across more accurately this way.

I think a more accurate title is "prioritization is key to a healthy mind.". Forgetting is just deprioritizing, and only by prioritizing can our mind efficiently filter and process the most important information.