The most important 'speed' issue is often not technical but cultural. It's convincing everyone that the company's survival depends on everyone moving as fast as possible.

A lot of people assume that creating software is purely a solitary activity where you sit in an office with the door closed all day and write lots of code.

If you really could take the CO2, when you burn hydrocarbons - coal, for example - if you could really capture the carbon and sequester it - they call it CCS - if the extra capital cost, energy cost, and storage costs over time didn't make it super expensive, then that's another path that you could go down.

Every three years, we have to go to the governments and say, okay, you know you're saving millions of lives and even though your budgets are tight, helping Africa avoid this disaster really is a priority.

When you revolutionize education, you're taking the very mechanism of how people be smarter and do new things, and you're priming the pump for so many incredible things.

Innovation is a good thing. The human condition - put aside bioterrorism and a few footnotes - is improving because of innovation.

Often you just have to rely on your intuition.