In Act 4 Scene1 of Macbeth, Macbeth goes to see the witches to get another prediction of events to come. At the beginning of the scene, the witches are making a spell to help conjure the apparitions that will show Macbeth his future. Just before Macbeth arrives, the second witch says, "By the pricking of my thumbs, something wicked this way comes" (IV.i.44-45). This is an element of symbolism and foreshadowing: the witches already know that Macbeth is on his way, so the witch's statement foresees his arrival. In addition, she calls him "wicked," and by this point in the play, Macbeth has already shown that he is an evil, selfish character who will stop at nothing to have his way. As the witches show Macbeth the apparitions, the foreshadowing and symbolism continues, and the appartitions appear as symbols of future events: the armed head which represents Macbeth's duel with Macduff, the bloody child which represents Macduff's having been ripped from his mother's womb, and the crowned child holding the tree which represents Malcolm's ordering the English army to use the trees of Birnam wood to disguise their approach.