The Three Witches go to meet Hecate, (the god of witchcraft, magic, the night, moon, ghosts and necromancy) who is responsible for the witches powers and essentially their boss. She is displeased for they did not come to her for advice before they told Macbeth his future. She then shares her plan to them, using spells she will create powerful illusions that will fool him into thinking he is greater than fate, death, wisdom, grace and fear. She dissipates, and the witches leave, knowing she will return.
“He shall spurn fate, scorn death, and bear his hopes ‘bove wisdom, grace and fear. and as you all know, security is mortals’ chiefest enemy.”