The Things That Drive Us Crazy

Here's a "Reality Principle" from a list I have from a class I took one time. It is No. 2 on the list of 10:

"The things about people that drive us crazy are the things that are keeping them sane."

Can that be true? What a wild concept! Making me wonder what are the things "keeping ME sane" that drive other people crazy? Assuming I'm sane. Which I believe I am.

I'll think of that statement for a while. And see if I can discern any truth in it in the people I meet.