The raven himself is hoarse that croaks the fatal entrance of Duncan under my battlements.
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 of remorse, that not compunctious visitings of nature shake my fell purpose, nor keep peace between th' effect and it.
The raven, (likely the messenger or a supernatural messenger) tells Lady Macbeth, that when Duncan enters the Macbeth Manor, he will die in the Macbeth Manor.
Come to my woman's breasts and take my milk for gall, you murd'ring ministers, wherever in your sightless substances you wait on nature's mischief.
Lady Macbeth calls upon supernatural beings to renounce her gender, because of the stereotype of men being stronger and more ruthless than men. She wishes to be filled from head to toe of the direst (strongest) cruelty.
Come, thick night, and pall thee in the dunnest smoke of hell, that my keen knife see not the wound it makes, nor heaven peep through the blanket of the dark to cry "Hold, hold!"
Lady Macbeth wants the demons she is calling forth, or calling on to "Stop up th' access to remorse" meaning to make her not feel regretful about what she would do, which is to kill Duncan so she can become queen, and Macbeth can become king
Great Glamis, worthy Cawdor, greater than both by the all-hail hereafter! Thy letters have transported me beyond this ignorant present, and I feel now the future in the instant.
Lady Macbeth believes that she would be unable to kill Duncan because of her gender, so she calls the supernatural beings forward to swap her woman'[s milk for gall (strength)
She evokes a thick night, or a lack of light, to be the blanket or shroud that disguises her murder of Duncan, so that no one can or will know who killed Duncan.
Macbeth enters the house right after Lady Macbeth's soliloquy and she greets him by thanking him for telling her of his encounter with the witches.