Facebook creator and Chief Executive Officer Mark Zuckerberg is known for being very subdued and measured with his public comments. Tuesday, we were given a peak behind the curtain as secretly recorded audio was leaked from private session between Zuckerberg and Facebook employees.

The audio comes from two July company meetings meant to give Zuckerberg the opportunity to address all the questions surrounding Facebook at the time and answer employee questions. The recordings show a different, much more candid side of the famously guarded CEO.

In the recordings, Zuckerberg voices his displeasure with Democratic presidential candidate Elizabeth Warren’s ideas to break up the social media giant. He also makes fun of Twitter’s revenues and explains why he does not attend more governmental hearings about Facebook.

Here are the most talked about quotes from the leaked audio:

About fighting Elizabeth Warren as president:

“You have someone like Elizabeth Warren who thinks that the right answer is to break up the companies … if she gets elected president, then I would bet that we will have a legal challenge, and I would bet that we will win the legal challenge. And does that still suck for us? Yeah. I mean, I don’t want to have a major lawsuit against our own government. … But look, at the end of the day, if someone’s going to try to threaten something that existential, you go to the mat and you fight.”

Making fun of Facebook competitor, Twitter:

“It’s why Twitter can’t do as good of a job as we can. I mean, they face, qualitatively, the same types of issues. But they can’t put in the investment. Our investment on safety is bigger than the whole revenue of their company.” [laughter]

On why he doesn’t testify at more hearings:

“I’m not going to go to every single hearing around the world. A lot of different people want to do that. When the issues came up last year around Cambridge Analytica, I did hearings in the US. I did hearings in the EU. It just doesn’t really make sense for me to go to hearings in every single country that wants to have me show up.”