Themes could be "things are not as they seem" , and "The corrupting power unchecked ambition"
Figurative language could be " Ay, in the catalogue you go for men,As hounds and greyhounds, mongrels, spaniels, curs, Shoughs, water-rugs, and demi-wolves are clept" Meaning that they are as worthy as a pug would be to a wolf if they didn't kill Banquo.
The theme "things are not as they seem" Started to develop in Act 2. It starts developing because Macbeth goes behind the kings back pretending to be his faithful soldier, but in the end Macbeth just wants to kill the king because of the proficy.
The theme "The corrupting power unchecked ambition" Started to develop in Act 1. Once Macbeth realized that he was going to be king and the proficy was true it went to his head. He wanted to become king at that second. So his plan was to kill the king and the sons. Also once he became king he started going insane and seeing things. Therefore, the theme "The corrupting power of unchecked ambition"