There is only one kind of wisdom that has any social value, and that is the knowledge of one's own limitations.
I never had a hat, never wore one, but recently was given a brown suede duck-hunting hat. The moment I put it on I realized I was starved for a hat. I kept it warm by putting it on my head. I made plans to wear it especially when I was going to do any thinking. Somewhere in Virginia, I lost my hat.