once you start killing, its impossible to stop- its addictive-like a warning to King James to be a good king
"I am in blood stepped in so deep"
its hard to quite, psychology of blood lost
"out damned spot"
calling the spot damned even though she knows damn well that she is the one that is stained or damned
refers to it as a "spot" - perhaps trying to euphemise the "deeds" that they have done so she can get over her guilt- or perhaps Shakespeare is trying to pass a message here that even the littlelest of bloodshed will lead to a disastrous tragedy
"will all great Neptunes ocean wash this blood clean from my hand"
