Analysis of Castles by the Sea

A castle made of sand
stands tall against
the waves,  
safe behind
the line we drew
to catch the rising tide.

We watch the sea pour in
to reach the mark
we've made,
as memories
and time absorb
like water into sand.

And when the final grain
has fallen on
my time,
and empty is
the hourglass
behind the fragile line,

the setting sun will hum
a lullaby
you've heard
from moons ago,
awaiting still
a harmony not written.

And may this melody
be known when I
am gone,
if just a whispered
memory,
a breath in morning wind.

Take with you our time,
and take it down
the line,
where castles fall
and rise again
to greet the coming tides.

Each step that marks the past
and those I've yet
to take-
the broken, bent,
the stayed or strayed-
all lines lead back to you.

Brave the shoreline,
knowing
where the tides
have carried me.

I'll meet you where
the circle ends,
and we
begin again.