I'm just going to have to trust you completely...

I'm here with some time to myself, and I ought to be at least doing some maths, or more importantly, writing my personal statement for the teaching thing, and my brain is hurting because try as I might, I cannot come up with a convincing, succinct reason why I would make a good teacher, or indeed why I want to be one in the first place, or what skills I have that would endorse this...
This is quite posssibly the hardest thing I've ever had to write. It's almost twenty years since I last applied for anything, well save for that spate of MA applications in the mid nineties at fancy art schools, which ultimately proved to be fruitless.
So I'm stuck. Good and proper..