Advantages of Writing

“Writing is not only a great way to discover what we are thinking, it is also a way to uncover lacunae in our thinking. Unfortunately, that means we must be prepared to catch ourselves red-handed when we seem not to be thinking at all. The fact should not escape us that when the writing is not going well, our still-nebulous thoughts are not yet ready to be expressed in words.”
--Harry Wolcott

Add to your understanding and add to your vocabulary.  
If you don't know the words, look them up!
Here's a link for one word that includes pronunciation: http://dictionary.reference.com/browse/lacunae