"This sentence has five words. Here are five more words.
Five-word sentences are fine. But several together become monotonous.
Listen to what is happening. The writing is getting boring. The sound of
it drones. It’s like a stuck record. The ear demands some variety. Now
listen. I vary the sentence length, and I create music. Music. The
writing sings. It has a pleasant rhythm, a lilt, a harmony. I use short
sentences. And I use sentences of medium length. And sometimes, when I
am certain the reader is rested, I will engage him with a sentence of
considerable length, a sentence that burns with energy and builds with
all the impetus of a crescendo, the roll of the drums, the crash of the
cymbals–sounds that say listen to this, it is important."