"no freedom of silence, either."

"We know, of course, that there is no freedom of speech.  But few people realize that there is no freedom of silence, either.  Residents of a communist state are required to make positive statements of belief and loyalty."

     "the eminent philosopher Hu Shi" on "China under Mao", as quoted by Ian Buruma in "China:  reeducation through horror," a review of The tragedy of liberation:  a history of the Chinese revolution, 1945-1957 (New York:  Bloomsbury Press, 2013), The New York review of books 61, no. 1 (January 9, 2014):  40 (39-41).  Baruma continues:

     There was no chance in China, or indeed the Soviet Union under Stalin, of what Germans during the Third Reich called "inner emigration."  Everyone had to take part in the revolutionary theater.

And what you had to convince the authorities of was your positive enthusiasm.