My Brittle Brittle Wall I Hide Behind

A huff and puff brittle wall created out of receding grains of hopeless sinking sand Purpose built to keep standing tall protecting the meek Something in Or Something out When placed up against the ravages of circumstance and the elements of time Will eventually succumb crumble and fall As even a wall no matter how well built Can only withstand an allotted amount of slings and arrows fired and slung at it Until eventually it let's something in it was purpose built in order to keep out Perhaps upon reflection the sand would have been better off being used to pass through an egg timer Or for someone who had placed all their eggs in one basket or traded for some magic beans instead