On Stupidity - There is no such thing as a foolproof plan. If there are fools about, no plan is proof against them.

On Perseverance – Persistence is admirable. Stubbornness is stupid. Just remember: the latter two even begin with the same three letters.

A learned fool is more a fool than an ignorant fool.

There is a certain solid use in fools. It is not so much that they rush in where angels fear to tread, but rather that they let out what devils intend to do.

As crazy as hauling timber into the woods.

And if to some my tale seems foolishness I am content that such could count me fool.