No man can exactly calculate the capacity of human genius and stupidity, nor the incapacity of will.
You can never underestimate the stupidity of the general public.
There is nothing worse than aggressive stupidity.
To forget one's purpose is the commonest form of stupidity.
We're the geniuses of the house because only a person intelligent as we could fake such stupidity.
The difference between stupidity and genius is that genius has its limits.