Expecting messiness and chaos as a natural part of product development is crucial when aiming to build something truly great. This mindset allows for adaptability, iteration, and learning from real-world usage. A strong company mission and vision serve as a foundation to steer amidst the chaos, while having principles for how you work helps contain the mess. It's essential to strike a balance between certainty and uncertainty, questioning everything and constantly reassessing. Failing to do so may lead to mediocrity and irrelevance. By embracing messiness and chaos, teams can create something truly remarkable.