[quote=HazmatMedic]
Our FatherWho art in heavenHallowed be thy nameHardly modern syntax, is it? I mean, I doubt that's what Jesus said, as he would have spoke Hebrew, so it's not like it's sacred. Why don't they update it? Or, even better, say it in Hebrew, or even Latin?
[/quote]

Jesus spoke Aramaic. At any rate, because of the connotations. It should reflect the importance and tradition, not to mention it is the most direct translation.