Human beings can also trust those they don't know, in the hope that the individual will have a positive influence as they achieve their goal. In Macbeth, when he goes to see the witches again due to his uncertainty, the three ally themselves with Hecate, causing him three ambiguous apparitions. First, an “armed head” (IV.i.73) warning him to beware of Macduff, then a “bloody child” (IV.i.83) advising Macbeth to “Be bloody, bold and resolute; Laugh to scorn the power of man, for none born of woman shall harm Macbeth” (IV.i.85-87). As well as "a crowned child, with a tree in his hand" (IV.i.93) informing him that he would be in good hands until "the great wood of Birnam to the high hill of Dunsinane comes against him". (IV.i.101-102) Hearing these prophecies, Macbeth believed himself to be untouchable and not to have a care in the world. Sure of what the twisted witches had to say, Macbeth let his guard down, making confidence his greatest flaw. The four witches knew that by misunderstanding the apparitions, Macbeth would believe himself to be safe. He trusted their words, given the accuracy of previous prophecies. Although Macbeth now justified himself and agreed with his past actions, he did not know that the royal blood he had shed first was affecting those close to him.