The witches embody the supernatural in the play. One of the most prominent themes in the play is the supernatural world versus the natural world. The supernatural world is characterized in terms of mystery, dark forces, and abnormality. Many critics agree that the witches are not necessarily the representatives of evil. Instead, they serve to highlight the dark forces in Macbeth's heart, and they motivate him to seek those forces so that they could help... The witches embody the supernatural in the play. One of the most prominent themes in the play is the supernatural world versus the natural world. The supernatural world is characterized in terms of mystery, dark forces, and abnormality. Many critics agree that the witches are not necessarily the representatives of evil. Instead, they serve to highlight the dark forces in Macbeth's heart, and they motivate him to seek those forces so that they could help him destroy himself. After all, Macbeth is the one who decides to act o...