How we cite our quotes: (Part.Letter.Paragraph)
Quote #1
Meanwhile our fastidious chambermaid was so much the more abashed because the ridiculous man, determined to outdo me in ingenuity, had coaxed her into a state of undress which the season might have explained, but could not excuse. (1.44.10)
Reputations matter to everyone in Dangerous Liaisons. If you want to control another person, threaten their reputation. The chambermaid's guilt about being caught in a compromising position (which Valmont himself arranged) will prove useful for Valmont. It will make her more "tractable," i.e. compliant.
Quote #2
I have searched my consciousness, and the blame is not mine: it would be too dreadful to have to look for it in you. (1.46.1)
Danceny, as a very young lover, doesn't have a lot of experience with women. His one-trick plan seems to be to make Cécile feel guilty for not writing to him and seeing him as much as he wants. He's blameless.
Quote #3
You pretend to be afraid of love, and you do not wish to see that it is you alone who are the cause of the evils for which you hold love to blame. (2.52.2)
In some ways, Valmont is a more direct, deliberate, and sophisticated version of Danceny. Both men manipulate others, particular women, by blaming them for their trials and tribulations.