Signal your voice, tone, and theme in your first two paragraphs. Write to inform, arouse, persuade. Readers . . . After all, readers have to decipher thousands of little notations and make sense of them. Unlike symphony musicians, they have no conductor to lead them through an essay or book.
Few phrases signal how fast or slow, or loud or soft a text is to be read.
Punctuation can help. Ernest Hemingway emphasized that writing, at its best, is exacting and often frustrating, in part because it is something you can never do as well as it can be done. Hemingway rewrote his ending of Farewell to Arms 39 times before he was satisfied. There's no rule on how it is to write. Sometimes it comes easily and perfectly.