Sometimes you want to give the internet more power than it really has. It seems weird that in one day, I've stumbled on Ed Park's loving tribute to James Joyce's longest sentence and then this passage, from an essay about writing by Kurt Vonnegut:
3. Keep it simple
As for your use of language: Remember that two great masters of language, William Shakespeare and James Joyce, wrote sentences which were almost childlike when their subjects were most profound. "To be or not to be?" asks Shakespeare's Hamlet. The longest word is three letters long. Joyce, when he was frisky, could put together a sentence as intricate and as glittering as a necklace for Cleopatra, but my favorite sentence in his short story "Eveline" is this one: "She was tired." At that point in the story, no other words could break the heart of a reader as those three words do.
Simplicity of language is not only reputable, but perhaps even sacred. The Bible opens with a sentence well within the writing skills of a lively fourteen-year-old: "In the beginning God created the heaven and the earth."