The author and co-founder of Credal.ai, Jack Fischer, reflect on their experience in YCombinator's W23 batch. They discuss the challenges of building a successful startup, including solving real problems for customers, changing user behavior, and overcoming the bar to entry. The authors emphasize the importance of being aware of one's own limitations and biases as founders, particularly when it comes to sales and fundraising. They also stress the need to move quickly and be willing to pivot or change direction if necessary, in order to increase the chances of success. Additionally, they highlight the value of humility and engagement with investors, recognizing that not all investors are created equal and that a good investor knows how to build a successful company.