I told my dentist that I think I had a toothache. They told me it was all in my head.
There is a joke about a tall wall, but you won't get it, it just goes over your head. I'm still trying to get over it.
A coworker said that you can't have a growth mindset if you stick your head in the sand. I simply told him that you can't grow if you don't have your roots planted.