end the beginning in Things Previously Written

the end of the beginning
may just be the middle
but the middle of what
can make it a riddle
the middle of something
can be very wide
so by definition
should be taken is stride

can the beginning of ends
include the beginning
like mosarian tablets
the beginning of sinning
it may be quite strange
discussing the matter
because the difference it seems
is before or the latter

so give definition
some clarification
where my beginning may end
with edification
in summary I thank you
and happily send
my promise to you
this wordplay shall end