Why is silence important?

Why is silence important?
I have an essay due on why silence is important

Silence is required in Class for teaching for learning and many other actions.

we don’t really think much about the power of silence, it’s only when there is silence you can listen to your heart and make good decisions. You get to think clearly about your thoughts. One thing that I noticed is that, the thoughts that keep your mind occupied for most of the time just vanishes when you are sitting in the silence. There are a lot of thoughts that are just like those people who can shout in the crowd and goes blank when asked to speak up solely. Silence gives your mind a chance to single out all the thoughts and give them enough time to crystallize while keeping all the unnecessary thoughts away.