"Oh, you can't help that," said the cat. "We're all mad here." This quote from Lewis Carroll's Alice in Wonderland highlights the whimsical and unpredictable nature of the characters in the story. It suggests that madness is a common trait among the inhabitants of Wonderland, emphasizing the fantastical and nonsensical environment that the story portrays.

The quote also reflects the idea that everyone has their quirks and eccentricities, and that this madness is simply a part of the charm and uniqueness of the world. It encourages embracing one's individuality and the unconventional aspects of life, which is a central theme in the imaginative world created by Carroll.