Macbeth's letter

Macbeth's letter gives information about Macbeth's and Lady Macbeth's personality. The ambition of Macbeth is clear when he says "I burned in desire to question them further" ("burned" underlines the great intensity of his desire) and the prophecies of the witches made him think a lot about his future ("I stood rapt in the wonder of it", the word "rapt" confirms that the thought is deep).

Lady Macbeth has a key position in the last part of the letter. Macbeth refers to her as "my dearest partner of greatness" that underlines her importance in Macbeth's life. Her position is confirmed by the repetition of "you" that is the subject of the following lines. Macbeth's personality is the setting of the battle between his loyalty and his ambition and he needs his wife to make a decision so it seems he is trying to please and persuade her (this is confirmed by the use and the repetition of the words "greatness" and "rejoicing"  and the great repetition of the sound -s).

The following thoughts of Lady Macbeth confirm Macbeth's personality that is mirrored in the structure of the text. Each phrase is followed by another one of opposite meaning (one refers to his loyalty while the other one to his ambition): it is a kind of antithesis that creates balance, the same balance that Macbeth's personality is looking for between loyalty and ambition (Lady Macbeth will help Macbeth to make ambition surmount loyalty).

The conditional is the most frequent mood; it gives insecurity to Lady Macbeth's thoughts and forecasts. Insecurity is also conveyed by the words "fate" and "metaphysical aid" at the end of the text (the words do not belong to human nature and so cannot be under the control of human being. From that(?) the reader may even understand how the tragedy will end.

The phrase "That I may pour my spirits in thine ear" is in key position: it is the moment when action overtakes thinking but the phrase reminds the reader of a temptress such as Eve.

While Macbeth does not know what he should do, Lady Macbeth perfectly knows the border between Good and Evil. This is perfectly conveyed by the structure of the text where the border between loyalty(Good) and ambition (Evil) is clear thanks to punctuation how the reader can notice (just watching the text and not reading it). But in Lady Macbeth the order has been turned upside down.