Sorry, I don't see anything public. I remember a particular talk he gave in maybe 2018 or 2019 while he was at Uber. IIRC the talk started roughly:

<shows picture> Do any of you know what this animal is? This is a sea squirt. What's interesting about the sea squirt is that it has a brain --but for only part of its life. It starts out mobile, seeking a place to live. But once it finds a place, it fixes itself to a rock and digests its brain. What this shows us is the purpose of intelligence: it is motion. Intelligence is about moving things around. <continues to argue that AI is central to Uber's mission...>