They mean one thing to one person, another thing to another person; they are unintelligible to one generation, plain as a pikestaff to the next. And it is because of this complexity that they survive. Perhaps then one reason why we have no great poet, novelist or critic writing to-day is that we refuse words their liberty. We pin them down to one meaning, their useful meaning, the meaning which makes us catch the train, the meaning which makes us pass the examination. And when words are pinned down they fold their wings and die.