Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), known by his pen name Mark Twain, was an American writer, humorist, entrepreneur, publisher, and lecturer. He was lauded as the "greatest humorist [the United States] has produced", and William Faulkner called him "the father of American literature". His novels include The Adventures of Tom Sawyer (1876) and its sequel, the Adventures of Huckleberry Finn (1884), the latter often called "The Great American Novel".
You may find more from Mark Twain on Wikiquote
It is one thing to decry the rat race. … That is the good and honorable work of moralists. It is quite another thing to quit the rat race, to drop out, to refuse to run any further — that is the work of the individualist. It is offensive because it is impolite; it makes the rebuke personal; the individualist calls not his or her behavior into question, but mine.