No writer ever knows enough words but he doesn’t have to try to use all that he does know. Tests would show that I had an enormous vocabulary and through the years it must have grown, but I never had a desire to display it in the way that John Updike or William Buckley or William Safire do to such lovely and often surprising effect. They use words with such spectacular results; I try, not always successfully, to follow the pattern of Ernest Hemingway who achieved a striking style with short familiar words. I want to avoid calling attention to mine, judging them to be most effective as ancillaries to a sentence with a strong syntax.
My approach has been more like that of Somerset Maugham, who late in life confessed that when he first thought of becoming a writer he started a small notebook in which he jotted down words that seemed unusually beautiful or exotic, such as chalcedony, for as a novice he believed that good writing consisted of liberally sprinkling his text with such words. But years later, when he was a successful writer, he chanced to review his list and found that he had never used even one of his beautiful collection. Good writing, for most of us, consists of trying to use ordinary words to achieve extraordinary results.
I struggle to find the right word and keep always at hand the largest dictionary my workspace can hold, and I do believe I consult it at least six or seven times each working day, for English is a language that can never be mastered.* [*Even though I have studied English for decades I am constantly surprised to find new definitions I have not known: ‘panoply’ meaning ‘a full set of armor’, ‘calendar’ meaning ‘a printed index to a jumbled group of related manuscripts or papers’. — Chapter IX “Intellectual Equipment”, page 306

He that thinks with more extent than another will want words of larger meaning; he that thinks with more subtilty will seek for terms of more nice discrimination; and where is the wonder, since words are but the images of things, that he who never knew the original should not know the copies?
Yet vanity inclines us to find faults any where rather than in ourselves. He that reads and grows no wiser, seldom suspects his own deficiency; but complains of hard words and obscure sentences, and asks why books are written which cannot be understood?

Some people have a way with words, and other people...oh, uh, not have way.

It's fun to read things when you don't know all the words. Even children love it. One of the things any great children's writer will tell you is that children like it if in books designed for their age group there is a vocabulary just slightly bigger than theirs. So they come up against weird words, and the weird words excite them. If you describe a small girl in a story as "loquacious," it works so much better than “talkative.” And then some little girl will read the book and her sister will be shooting her mouth off and she will say to her sister, "Don't be so loquacious." It is a whole new weapon in her arsenal.

If a thing can be said in ten words, I may be relied upon to take a hundred to say it. I ought to apologize for that. I ought to prune, pare and extirpate excess growth, but I will not. I like words — strike that, I love words — and while I am fond of the condensed and economical use of them in poetry, in song lyrics, in Twitter, in good journalism and smart advertising, I love the luxuriant profusion and mad scatter of them too.