Can you please check these last sentences, please?

1) The blood on his hands is on the one hand symbolic of the evil crime he has committed and on the other hand is representative of Macbeth's guilt which cannot be escaped.
2) Nothing can make his hands innocent. He will bring corruption to all he comes in contact with. Lady Macbeth says that her hands are also red and she is ashamed to have a coward’s heart.
3) She urges him to move so that he can appear as though he has just awakened. She also tells him not to be lost so badly in his thoughts.
4) She believes his firmness of mind has deserted him and left him unattended. Macbeth says that if he must know his deed , than it would be best for me to lose all knowledge of himself.
5) Macbeth does not mention the crime explicitly. There are several reasons why the murder takes place off-stage. 6) First of all, representing a regicide on stage was regarded as an offence towards the figure of the king. 7) Second, the open structure of the Elizabethan stage made it difficult to handle corpses. Finally, the murder off-stage enabled Shakespeare to throw light onto his characters’ reactions and at the same time to stimulate the audience’s imagination.

What do you do with the corrections I have already made? I feel I'm wasting my time when I reread what I've already read and especially when I have already corrected something only to read it uncorrected AGAIN. Case in point:

than it would be best for me = not "than" but THEN and what is "me" doing in that sentence??? = "for him" That had to be straight copying from the book.

Everything else seems AOK.

Sra