I expected Lippincott to stand up and threaten Siracuse, threaten him with exposure, with all the evidence he'd accumulated against Siracuse over the years, with all the forces of justice he could bring to bear. Instead, after a moment, he nodded in resignation, like he'd just done the math himself and had to agree with Siracuse's answer.
-- Charlie (Chapter 48 paragraph 20)

Importance: This demonstrates the true Andrew Lippincott, a man obsessed with his own career who makes every attempt to justify his actions, regardless of how corrupt they are.

He nodded. That's all, just nodded. He didn't even hint that anything I described could have been in my head. He didn't do the same old song and dance about me being paranoid. And I suddenly realized why. 'You knew,' I said. 'You knew I wasn't paranoid. You knew I was being followed all those years, yet you convinced me I was nuts.' His...
-- Charlie (Chapter 34 paragraph 27)