Words count. The difference between good writing and good speaking is mostly in word selection and sentence structure. English has evolved over hundreds of years so that we can communicate more clearly and use a single meaningful word to describe the same thing that previously required several words. Yet most people recognize only a small percentage of the words in the English language. Most of the words are obscure and rarely needed. However, the larger your vocabulary, the more concise you can be. A poor choice of words may obscure a great thought. Good ideas are not worth much if they are not communicated effectively. Communicating an idea by writing it down is a great way to organize thoughts, analyze alternatives, and reason through its strengths and weaknesses.