Insane people are always sure that they are fine. It is only the sane people who are willing to admit that they are crazy.
- Nora Ephron
Then there's the quote, from Lisa Simpson, that goes something like, Intelligence is inversely proportional to happiness.
And lastly, there's the scientific study which showed that the least competent people are the least aware of their incompetence.
I guess this means that I am sane, smart and cloaked in self-doubt.