Just a quick response to your question on why the first three petitions
of the LP are formulated in 3rd person aorist imperatives. As BDF note
(sec. 337 n. 4) this is simply stardard Greek practice in prayers (and in
liturgies), particularly those with specific petitions. It does not
necessarily reflect any special feature of a presumed Aramiac
original, whatever that may have been.
Jeffrey
jgibson@acfsysv.roosevelt.edu