I typically give two examples when people ask me which founders embody both fire and ice: @t_xu of DoorDash can manage at both the strategic and execution level flawlessly. He often describes the need for conviction accompanied by evidence, so that conviction does not become delusion. DoorDash’s mission to empower and grow local economies is bold and ambitious, but they’ve paired it with relentless attention to unit economics, delivery times, and defects. Tony Hsieh is another. At Zappos, I liked to say that Tony was the fire and I was the ice. We attacked problems from different vantage points, but generally reached the same conclusion. Tony was highly creative and entrepreneurial. I was more oriented toward numbers and operating detail. The result was a strong balance, though our running joke was that I would create operational efficiency and Tony spent it on new ideas.