Thinking Too Much

Thinking too much,
There's a problem there.
Of which all people
Should be aware.

Thinking too little?
That's not very smart.
You've got stupidity
Down to an art.

But think too much
And you fail to see;
You overlook often
The most obvious things.

Thinking in the middle,
Your average Joe,
They see what most see
But don't care to know.

And what do I think?
My thinking's unclear.
Because who am I to judge
The thinking of a peer?