duncans mistakes: trust the original thane of cawdor
and to trust macbeth
"stars hide your fires let not light see my black deep desires"- stars symbolize fate but macbeth wants to hide their fires he wants to create an artificial fate
"here lay duncan, his silver skin with his golden blood"- juxtaposes macbeths black desires
"as his gash stabs look like a breach in nature" - breaking great chain of being
“O valiant cousin worthy gentleman“
Duncan says to Macbeth showing he trusts Macbeth too much similarly to what he did to the previous thane of Cawdor