How does the banquet scene demonstrate how Macbeths character has changed?
I haven’t got the play right now but I remember the scene. So from memory, it showed MacBeth had lost his confidence and was feeling guilty, when he started to respond to Banquo’s ghost. He started to give the people at the banquet reason to suspect that he had something to fear. (Those who hadn’t already guessed that is). To answer your question more accurately it was MacBeth’s fearful speech, which really gave away his murderous act. Then his erratic actions, jumping from his seat and watching the ghost, that showed he was no longer the brave, noble, warrior that he had previously appeared to be.