We realize the importance of our voices only when we are silenced page number

The quote could be seen on page number 186.

This is one of the famous quote from a book called 'I am Malala'

The book told a story about a girl that grew up in the Taliban and have to experience many form of silencing and thought policing.

The quote indicated that people often forget how good it is to live in a place where you could express your opinion freely.