How we cite our quotes: (Chapter.Paragraph)
Quote #1
Azalea smacked Fairweller […] How dare he! How dare Fairweller say such a thing! When he knew how ill Mother was! Azalea had to find the King. (3.1-2)
Azalea's first response to hearing Fairweller say that her mother is dead is to think that he's lying, or playing a prank, or something (even though Fairweller doesn't really seem like the type to make jokes or play pranks). Here we see that one of the first reactions to bad news is often denial, which can be expressed by accusing the deliverer of bad news of lying.
Quote #2
"I can't let you break the rules of mourning not even for dancing, which I know your mother loved. I'll have to lock the ballroom, misses, and I'm afraid that if I catch y' at it again, I'll feel it my duty to write to your father." (6.38)
Mr. Pudding clearly feels badly for the girls, but not enough to become their accomplice and lie to the King about it. In fact, he threatens them with telling the King the truth, by means of writing him a letter about it while he's away at war. The fact that the girls have gotten away with dancing a couple of times under his watch, however, means that he's already kept quiet about the truth at least a few times.
Quote #3
"I am a highborn gentleman," he said as they pressed the teacups between their hands. "A lord. When the High King D'Eathe reigned, I was a member of his court." (8.11)
Within moments of meeting the girls, Keeper is lying to them. Well, kinda. As the High King himself, he was a member of the court, and he was highborn—but he obscures the truth and makes it sound like he was just another nobleman, instead of the sadistic madman who has vowed to kill their father, the Captain General.
Quote #4
They couldn't request the services of their shoemaker even in secret. Mr. Pudding was in charge of the accounts while the King was gone, and they couldn't stir up any suspicion. (9.2)
How to dance in secret if your dancing slippers start to wear out? This is the question Azalea and her sisters face. Since they're pretty poor (especially given that they're a royal family), it's not like they have piles of cash lying around to go out and buy new shoes with, or pay for the services of someone who can mend the ones they have.
Quote #5
The handkerchief was large enough that everyone could touch a piece of it—just. Azalea spoke the promise. She had them promise not to tell anyone, or show anyone, and never let anyone know about the passage or the pavilion or the Keeper. (10.112)
Swearing on silver (like the handkerchief) is a big deal in this world, as magic exists here, so when Azalea and her sisters swear to keep the pavilion a secret, they're going to be magically bound to maintain its secrecy. They probably didn't think ahead to why deceiving others about it could turn out to be a not-so-good idea.
Quote #6
"So. If you cannot be heard from your room, then, where could you be dancing? Hmm? There are no secrets and underhanded dealings in this household, young ladies. If you are harboring a secret, then I will be told at once." (11.103)
The King is apparently not a big fan of secrets, and especially not when his young daughters are the ones keeping them. This fits with what we know about him: he seems like a pretty straightforward and honest dude, so deceit must annoy him. Add in the overprotective father instinct, and he's probably worried about his girls getting into trouble and him not being able to help them because they've deceptively kept the cause of the trouble a secret.
Quote #7
"Oh, no hard feelings, my lady," said Keeper. "I simply think you are not trying hard enough. Your mother's brooch should give you all… encouragement." (18.116)
Uh oh, we've caught Keeper in another lie. Sure maybe one reason he's keeping the girls' mother's brooch is that it'll help motivate them to look for the magic object he needs destroyed… but as we learn later, it's also because he can take on the appearance of any person whose belonging he possesses. Keeper's definitely got an agenda here.
Quote #8
"I expect," he whispered, "you are wondering what you could possibly do to keep me from hurting your mother further. Is that not so?" (18.178)
Another big fat lie from Keeper: he took on Azalea's mom's appearance in order to trick Azalea into thinking that he'd captured her soul. This way, Azalea will be more cooperative with Keeper's plans. It's a pretty nasty way to deceive someone into helping you.
Quote #9
The King would be up in arms over this. Fairweller, courting Clover, not only in mourning, but without the King's approval or knowledge. There would be a duel. (22.47)
This is another way that secrets and deceit can have a negative effect: courting young ladies without their father's knowledge or permission is a very bad thing indeed. It could even hurt someone, if a duel takes place as a result.
Quote #10
"Oh, there now," he said in Mother's voice. "You didn't honestly think I was her? Were you so desperate to believe that a person had a soul, you were willing to believe in anything? Stupid, stupid." (25.53)
Now we see the depth of Keeper's treachery: not only was he using the girls to get out of his enchanted pavilion, he also had no problem impersonating Azalea's mom and causing her untold amounts of emotional pain in the process. Was Azalea too trusting? Maybe. But all the blame lies with Keeper for being so full of lies and deceit in the first place.