Assuming that the question is asking for the meaning and significance behind this soliloquy, Macbeth has this hallucination of the dagger near the beginning of Act II in the play. Lady Macbeth has persuaded Macbeth to go ahead with plans to murder King Duncan, and Macbeth is now seriously considering the plan. The dagger itself may be seen as a symbol of Macbeth's ambition, greed, and guilt--Macbeth is tempted by his strong desire to see the witches' prophecy come true, yet he still feels a tinge of guilt believing that he must murder the King in order to take his position on the throne.
Near the end of the soliloquy, a bell sounds. The bell foreshadows the immediate death of King Duncan, but also foreshadows the treacherous fall of Macbeth. His killing King Duncan begins a path of destruction for Macbeth that ultimately leads to his own downfall.
See eNotes Ad-Free
Start your 48-hour free trial to get access to more than 30,000 additional guides and more than 350,000 Homework Help questions answered by our experts.
Already a member? Log in here.