This is one of the most important lessons of the scientific method: if you cannot fail, you cannot learn.

We need to reengineer companies to focus on figuring out who the customer is, what's the market and what kind of product you should build.

We must learn what customers really want, not what they say they want or what we think they should want.

Sustainable growth is characterized by one simple rule: New customers come from the actions of past customers.

Products a start-up builds are really experiments…Learning about how to build a sustainable business is the outcome of those experiments [which follow] a three-step process: Build, measure, learn.” “[A startup is] … an organization dedicated to creating something new under conditions of extreme uncertainty.

The lesson of the MVP is that any additional work beyond what was required to start learning is waste, no matter how important it might have seemed at the time.

The mistake isn't releasing something bad. The mistake is to launch it and get PR people involved. You don't want people to start amping up expectations for an early version of your product. The best entrepreneurship happens in low-stakes environments where no one is paying attention, like Mark Zuckerberg's dorm room at Harvard.