We flew down weekly to meet with IBM, but they thought the way to measure software was the amount of code we wrote, when really the better the software, the fewer lines of code.

Other paths would include making nuclear fission cheap enough and safe enough that people broadly embrace it, so that could be scaled up.

Technology must be implemented as part of a thoughtful, holistic approach to education transformation that includes teacher training, relevant curricula, parental involvement, and programs for children that fill unmet needs for basics like nutrition and health care.

Effective philanthropy requires a lot of time and creativity - the same kind of focus and skills that building a business requires.

Microsoft has had many, many successful products. I'm committed to one company. This is the industry I've decided to work in.

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

Reward worthy failure - Experimentation.