Why do Quakers say "thee" and "thou"?

I think its cool.
And what is talked about at meetings? - can you give examples or is it not to be disclosed?
Update: Powzer - great idea - I'm up for it!
Update 2: I know its old English - I am asking why British Quakers say it, which they do
Update 3: Mariah - I think some British Quakers still say it. And do you have an answer to my second question?
Update 4: Thanks Caicos, I was interested in what was said at one of these inspiration moments
Update 5: Mickey - thats weir a *** frum lad tha knows!
Update 6: ok yahoo "come from" is that better
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