How does a minor character in 1984 show the theme of the novel?

In ,uses minor characters to demonstrate the extent of the Party's
control and to warn against the dangers of totalitarian regimes.

Take the
character of Syme, for example, who appears in Part One, Chapter Five. Syme is a colleague of 's
and works on the development of Newspeak, the official language of Oceania. During conversation,
Syme explains the purpose of Newspeak:

We're destroying
words - scores of them, hundreds of them, everyday. We're cutting the language down to the
bone. 

More importantly, the purpose of this
cutting-down is to control people's ability to express their...