Silence in Sleep

Today when we were sharing our observations of silence, I noticed that many of us brought up this routine of stressing ourselves out right before we sleep at night. I'm guilty as well! Even when I actively search for silence, my thoughts don't stop and all of a sudden it gets really loud in my mind. It was frustrating that I couldn't be silent in my mind. I thought silence would be easy to come by but it's not. Although I did think of a moment of when there's absolute silence... when I'm asleep! My mind eventually stops racing with thoughts and I can finally fall asleep. I don't think any kind of sleep means there's silence - it's the dreamless nights of sleep I'm specifically thinking of. I'd like to think that while I sleep at night, there is some form of silence that I can acheive.