An entrepreneur must deal with more uncertainty than a professional with a well-defined role.
The core problem in our society is political correctness.
There's absolutely no bubble in technology.
Education is a bubble in a classic sense. To call something a bubble, it must be overpriced, and there must be an intense belief in it.
There's always a sense that people will do things quite differently if they think they have privacy.
The optimism that many felt in the 1960s over labour-saving technology is giving way to a fearful question: 'Will your labour be good for anything in the future? Or will you be replaced by a machine?'
I spend an awful lot of time just thinking about what is going on in the world and talking to people about that. It's probably one of my default social activities, just getting dinners with friends.
I think society is both something that's very real and very powerful, but on the whole quite problematic.
You don't want to just do 'me too' companies that are copying what others are doing.
I did not want to write just another business book.
Properly defined, a startup is the largest group of people you can convince of a plan to build a different future.
When I was starting out, I followed along the path that seemed to be marked out for me - from high school to college to law school to professional life.
Whereas a competitive firm must sell at the market price, a monopoly owns its market, so it can set its own prices. Since it has no competition, it produces at the quantity and price combination that maximizes its profits.
I'm very pro-science and pro-technology; I believe that these have been key drivers of progress in the world in the last centuries.
I think it's a problem that we don't have more companies like Facebook. It shouldn't be the only company that's doing this well.
One of my friends started a company in 1997, seven years before Facebook, called SocialNet. And they had all these ideas, and you could be, like, a cat, and I'd be a dog on the Internet, and we'd have this virtual reality, and we would just not be ourselves. That didn't work because reality always works better than any fake version of it.
Investors are always biased to invest in things they themselves understand. So venture capitalists like Uber because they like driving in black town cars. They don't like Airbnb because they like staying in five-star hotels, not sleeping on people's couches.
Every time you write an email, it is in the public domain. There are all these ways where security is not as good as people believe.
Had the people who started Facebook decided to stay at Harvard, they would not have been able to build the company, and by the time they graduated in 2006, that window probably would have come and gone.
How to teach people to do what hasn't been done is a great riddle.
Every correct answer is necessarily a secret: something important and unknown, something hard to do but doable.