“In that direction,” the Cat said, waving its right paw round, “lives a Hatter: and in that direction,” waving the other paw, “lives a March Hare. Visit either you like: they’re both mad.”
“But I don’t want to go among mad people,” Alice remarked.
“Oh, you ca’n’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.” —Chapter 6, Pig and Pepper

Socks sure to give you an ear to ear grin. Or drive you mad. We're not quite sure which.