Saying something is not the only way to communicate. If you leave a pause at a specific place within a sentence, the listener will often fill that space with his or her own construction.
Asking questions is another powerful way to imply ideas.
Language is a holistic process- it's more than just words and leaving space within a phrase can carry strong meaning. In fact, you can only have a spoken language with sound juxtaposed against silence. In just the same way, you may only have music when sound is juxtaposed against silence.