What are some famous Mark Twain quotes?

Some famous Mark Twain quotes are: "I have never let my schooling interfere with my education," and, "One of the striking differences between a cat and a lie is that a cat has only nine lives." Another quote is, "Wrinkles should merely indicate where smiles have been."

One of Twain's humorous quotes is, "Clothes make the man. Naked people have little or no influence in society." Another Twain quote reads, "It's not the size of the dog in the fight, it's the size of the fight in the dog." Twain's formal education did not progress past elementary school, and many of Twain's quotes are negative about the education system.