what is being said in the following line:
“Foul devil, for God’s sake, hence, and trouble us not;
For thou hast made the happy earth thy hell,
Fill’s it with cursing cries and deep exclaims.”
Whenever you run into troublesome language from Shakespeare, here's an excellent website to use:
http://nfs.sparknotes.com/
For this particular quotation, click on the link for Richard III. Then click on Act I Scene 2, and read in the left column until you find these particular three lines. Look at the corresponding section in the right column for a "translation."