I think test-driven design is great. But you can test all you want and if you don’t know how to approach the problem, you’re not going to get a solution.

Peers can be the best teachers, because they're the ones that remember what it's like to not understand.

Let me just say that, if you ever have the choice of putting your words in powerpoint or having them carved into 30-foot high marble, I'd say go for the marble.

Python has been an important part of Google since the beginning, and remains so as the system grows and evolves. Today dozens of Google engineers use Python, and we're looking for more people with skills in this language.

All models are wrong, and increasingly you can succeed without them.

More data beats clever algorithms, but better data beats more data.

PowerPoint doesn't kill meetings. People kill meetings. But using PowerPoint is like having a loaded AK-47 on the table: You can do very bad things with it.