The full speech can be read here: The Enemies of Writing: A writer who’s afraid to tell people what they don’t want to hear has chosen the wrong trade.
“[I]f writers are afraid of the sound of their own voice, then honest, clear, original work is not going to flourish, and without it, the politicians and tech moguls and TV demagogues have less to worry about. It doesn’t matter if you hold impeccable views, or which side of the political divide you’re on: Fear breeds self-censorship, and self-censorship is more insidious than the state-imposed kind, because it’s a surer way of killing the impulse to think, which requires an unfettered mind. A writer can still write while hiding from the thought police. But a writer who carries the thought police around in his head, who always feels compelled to ask: Can I say this? Do I have a right? Is my terminology correct? Will my allies get angry? Will it help my enemies? Could it get me ratioed on Twitter?—that writer’s words will soon become lifeless. A writer who’s afraid to tell people what they don’t want to hear has chosen the wrong trade.”