BBC NEWS | Health | Negative thoughts 'make you ill'
Okay, I am really going to have to make more of an effort to cheer up:
Having negative thoughts really could make you more illness-prone, say scientists.
A study in the journal Proceedings of the National Academy of Sciences links "negative" brain activity with a weakened immune system.
My generally dour and depressed outlook come from my teenage years when I was a Goth and i have never managed to shake it. I think light (or rather lack of it can also have an effect:
Dr Davidson said: "Emotions play an important role in modulating bodily systems that influence our health.
"We turned to the brain to understand the mechanisms by which the mind influences the body."
So I think I will just have to learn to laugh at least once a day. Mostly at myself. Still my youngest son is a smiler, he is enough to cheer you up (so long as its not at 3am)