neural riddle

i tell you once
and then no more
i got you locked
behind my door

a door with neither
wood, key or lid
yet inside is
where you hid

you may take your time
but if too much
i just may
run out of luck

well since i got
nothing to loose
you just can't be
a sitting duck

so many things
that are wished to know
and no other way
for us to do so

don't try to break it
usuless to pick the lock
takes more than some
time to open this door

maybe that thing
that is so suspicious
may turn out to be
the only exit

our time is so shy
and why is it so hard
to accept the facts
that no words can describe?