Start-ups default path is towards death.

The only way to steer off this default path is through speed. It is the single most important vector for the company. Your team should enable this.

Many successful founders capture this ethos

Specific knowledge is something you learn and knowledge you cannot be trained for. Specific knowledge is found by pursuing your genuine curiosity and passion rather than whatever is hot right now. Become the best in the world at what you do (your specific knowledge) and keep redefining what you do until this is true.

Exploring what is mine, and hopefully it makes you think what is yours.