Mark Twain is one of the most celebrated authors in American history. Throughout his long career as a writer and lecturer, he instilled his wisdom about life to others through masterpieces (such as The Adventures of Huckleberry Finn and The Adventures of Tom Sawyer) and journal entries alike.

Twain, born Samuel Langhorne Clemens in 1835, consistently put down thoughts and ideas to paper that continue to inspire people today, decades after his death in 1910. His quotes encourage people to steep and mull ideas over in their minds, a skill necessary for critical thinking.

Twain’s works challenged readers to become critical thinkers, and one famous Mark Twain quote on critical thinking remains particularly relevant.

What is critical thinking?

Merriam-Webster defines critical thinking as “the act or practice of thinking critically (as by applying reason and questioning assumptions) in order to solve problems, evaluate information, discern biases, etc.”

It also notes an additional example from First Amendment expert Greg Lukianoff and social psychologist Jonathan Haidt: “Today, what we call the Socratic method is a way of teaching that fosters critical........

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