| Quote #7
GLOUCESTER. This is the fruits of rashness. Mark'd you not
It has literally only been minutes since the dying King Edward IV was able to seal up all the familial rifts with what will be his dying breaths. As soon as the news of Clarence's death comes out, Richard is able to undo all of Edward's good by casting aspersions on the queen's kin, suggesting that they were at the root of Edward's death. The irony is that the queen was the one who suggested that King Edward forgive Clarence. She wouldn't have done that if she'd been behind his death...though that's the kind of thing Richard might do.
| Quote #8
Like Richard, Buckingham is a master of manipulation. Here he argues about breaking the sanctity of sanctuary in a church. He even sounds pretty earnest about it, which makes you wonder to what extent Buckingham is aware of Richard's evil. By the logic he uses here, it seems Buckingham has learned how to justify anything. Also, the fact that Buckingham takes the time to rationalize and justify things makes him different from Richard, who never needs an excuse to do the unthinkable.
| Quote #9
Richard compares himself to the theatrical device "Iniquity," which was a stock character in 16th century morality plays to encompass all of the vices. This is an explicit hint that Richard views himself as a talented actor who can play many roles. He approaches his life as a play, and he is both actor and narrator. Perhaps this is why he doesn't anticipate his miserable end.