Field of Reeds is a heavenly paradise where Osiris rules. Ka of the Nile.
Ancient Egyptians believed that the soul resides in the heart.
Upon death, the Weighing of the Heart occurs.

I drank from the cup of His salvation and entered in
while the sun drank me and poured me out
I stood in the silence of time with my heels down  
weighing out the world  I measured my breath,
and found it to be good.  It is there that I understood
that Aaru fields of reeds is a golden healing place
that I could go to when I needed to be comforted;
I walked in with my shield and sword lifted high
shuffling through the reeds with my tender feet
not a blade of grass stirred not a single sound incurred
as my vision blurred, I dropped all my weapons
all my masks and facades for an ounce of Honesty;
I took my first sip of life at the cusp of death
and realized it was not I who named me Great Warrior
it was Osiris, as He pressed the Ankh to my forehead
my third eye opened and what I saw was a man with a heart of Gold.