Come, you spirits That tend on mortal thoughts, unsex me here,And fill me from the crown to the toe top-full Of direst cruelty. Make thick my blood. Stop up th’ access and passage to remorse, That no compunctious visitings of nature Shake my fell purpose, nor keep peace between Th’ effect and it. (Act 1 Scene 5 Lines 47-54). In act one blood represents the desire for power and the violence that is required to achieve power. Lady Macbeth wants to have the strength to murder Duncan in order for her husband to get the crown. The image therefore shows Lady Macbeth and Macbeth looking suspicious and gesturing to King Duncan, who is sitting on the throne.