Heraclitus is sometimes called The Obscure because he wrote in such a way as to make his ideas difficult to understand. That he was able to do this without the benefit of PowerPoint is evidence of his genius. He said the sun was about a foot across. He also said you can't step in the same river twice, because he never walked a dog along the Mississippi. When he got a bad case of dropsy, he slathered himself in cow dung, lay in the sun all day, and died. They also call him The Weeping Philosopher, and that's probably why.