Discuss the use of irony in Jane Austen's Pride and Prejudice?

Austen liberally uses irony to illuminate character flaws in her characters. Mrs. Bennet is made to look foolish and ignorant; “Well, my comfort is, I am sure Jane will die of a broken heart, and then he will be sorry for what he has done”  (Page 148) Whereas, Mr. Collins is made to be a hypocrite; “You ought certainly to forgive them as a Christian, but never to admit them in your sight, or allow their names to be mentioned in your hearing." (Page 232)