Course Hero. "Macbeth Study Guide." Course Hero. 10 Aug. 2016. Web. 11 Dec. 2017. <https://www.coursehero.com/lit/Macbeth/>.
Course Hero. (2016, August 10). Macbeth Study Guide. In Course Hero. Retrieved December 11, 2017, from https://www.coursehero.com/lit/Macbeth/
(Course Hero, 2016)
Course Hero. "Macbeth Study Guide." August 10, 2016. Accessed December 11, 2017. https://www.coursehero.com/lit/Macbeth/.
Course Hero, "Macbeth Study Guide," August 10, 2016, accessed December 11, 2017, https://www.coursehero.com/lit/Macbeth/.
This brief scene serves the practical purpose of getting Duncan to Macbeth's castle to advance the plot. At the same time, it underscores the heinous nature of Lady Macbeth's plotting. She smiles and provides warm hospitality to a guest in her home, knowing that she will take that hospitality away at knifepoint while the guest sleeps under her roof.