“Mad Hatter: “Why is a raven like a writing-desk?”
“Have you guessed the riddle yet?” the Hatter said, turning to Alice again.
“No, I give it up,” Alice replied: “What’s the answer?”
“I haven’t the slightest idea,” said the Hatter”

“The Mad Hatter: "Would you like some wine?"
Alice: "Yes…"
The Mad Hatter: "We haven't any and you're too young.”

“Alice: This is impossible.
The Mad Hatter: Only if you believe it is.”

“Mad Hatter: Would you like a little more tea?
Alice: Well, I haven't had any yet, so I can't very well take more.
March Hare: Ah, you mean you can't very well take less.
Mad Hatter: Yes. You can always take more than nothing.”

“Oh -- who's the Queen?"

"Her, of course. The White Queen. You're just like Alice, you know. Down the rabbit hole with the Mad Hatter.”

“Goats," said Maxwell Hyde, "are a special case. Mad as hatters, all of them.”

“Sometimes I feel sure he is as mad as a hatter and then, just as he is at his maddest, I find there is a method in his madness.”

“There is a place, like no place on earth. A land full of wonder, mystery, and danger. Some say, to survive it, you need to be as mad as a hatter. Which, luckily, I am.”

“While Mona Lisas and Mad Hatters,
Sons of bankers, sons of lawyers
Turn around and say good morning to the night.
For unless they see the sky,
But they can't and that is why
They know not if it's dark outside or light.”

“But I don’t want to go among mad people," Alice remarked.
"Oh, you can’t help that," said the Cat: "we’re all mad here. I’m mad. You’re mad."
"How do you know I’m mad?" said Alice.
"You must be," said the Cat, "or you wouldn’t have come here.”