As for drugs - well, Gates was certainly not unusual there. Marijuana was the pharmaceutical of choice.

If empathy channels our optimism, we will see the empathy and the diseases and the poor school. We will answer with our innovations and we will surprise the pessimists.

If success corrupts, I'm probably pretty corrupted by now.

The tool that's most associated with the recent progress against malaria is the long-lasting bed net. Bed nets are a fantastic innovation. But we can do even better. We can invent new ways to control the mosquitoes that carry the malaria parasite.

People often overestimate what will happen in the next two years and underestimate what will happen in ten.

To succeed, you also have to know how to make choices and how to think more broadly.

Thinking about impact on children meant adding to the agenda, both the R&D agenda and the delivery agenda, but it's amazing news, even in the scale of other tragedies.