This document discusses the importance of adopting the right entrepreneurial mindset or "state of mind" to succeed as a startup founder. It argues that founders need a "crushing-it" state of mind characterized by confidence, choosing the right team, embracing judgment from others, managing stress, and self-discipline. The document explores how this mindset differs from one focused on work-life balance and short-term happiness, and asserts that the crushing-it mindset will drive success and achieving big ambitions through intense focus and effort.