Mental work can be physically strenuous.
Fatigue
I Hope You Won’t Give Up on Your Very Tired Friend
A little forgiveness is called for.
There’s Tired and there’s TIRED—The Two Kinds of Fatigue With Chronic Illness
I can push through one…but the other demands rest.
The Best Gift Visitors Could Give Me In The Hospital: Quiet
Exhausted, I needed permission to be still.