The confusion is further compounded by the fact that multiple characters are speaking at once. This makes it difficult to follow what is being said, and it adds to the overall sense of chaos. The scene ends with Macbeth shouting, "Out, out, brief candle!" This line suggests that Macbeth is feeling a sense of despair, and that he believes that his life is coming to an end.
The overall effect of the words in scene 6 is to create a sense of chaos, confusion, and despair. This scene is a turning point in the play, as it marks the beginning of Macbeth's downfall.