"I was sitting in a chair in the patent office at Bern when all of a sudden a thought occurred to me: "If a person falls freely he will not feel his own weight." I was startled. This simple thought made a deep impression on me. It impelled me toward a theory of gravitation."

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What you believe matters, however. It’s all anyone has to act on. And since what you do is who you are, your actions define you. If you don’t believe anything is true simply because you can’t logically prove what’s true, you won’t do anything. You won’t be anything. You’ll end up spending your life in a rocking chair looking out at the horizon waiting for an answer that never comes. You might as well be dead. It’s an old philosophical problem.

— Russell Banks