Mark Twain was so good with crowds that he became, in competition with singers and dancers and actors and acrobats, one of the most popular performers of his time. It is so unusual, and so psychologically unlikely, too, for a great writer to be a great performer, too.
Kurt VonnegutDon't you think that's the main reason people find [writing] so difficult? If they can write complete sentences and can use a dictionary, isn't that the only reason they find writing hard: they don't know or care about anything?
Kurt Vonnegut