Building mental fitness is akin to being an elite athlete. It's not enough for the athletes just to have great technical skills, they need to be equally mentally prepared also.

Once social change begins, it cannot be reversed. You cannot un-educate the person who has learned to read. You cannot humiliate the person who feels pride. You cannot oppress the people who are not afraid anymore. We have seen the future, and the future is ours.

To me, a great leader should be empathetic, authentic, entrepreneurial, creative, ethical and lead from the front.

Slowly, over the course of a decade, we built relationships by proving we weren't there to destroy luxury's heritage and its 'unspoken codes of conduct,' but actually to protect them and enable this industry to thrive. We were fashion insiders, and we just happened to be coders too!

If you fail many times in life, it can be frustrating, but, if you look differently at that, you can see that if you fail many times, you get up many times. If you didn't get up after the first fall, you could never have fought. Failure just means you got knocked down.

Above all, great entrepreneurs have completed and undivided commitment to their company and doing what it takes to make it successful. Building any new major company is much harder than most realize, so if requires a very high pain threshold – great entrepreneurs are so tough mentally and emotionally.

Had the first astronauts or explorers listened to advice, chances are they would never have embarked on those world-changing adventures. The same is true of entrepreneurs. First and foremost, entrepreneurs are entrepreneurs because their gut had an insight or an idea that's driven them.

While optimism is essential and beneficial in many aspects of life, it can become a hindrance in the realm of large-scale, costly projects. As highlighted in our book, misplaced optimism in multi-billion-dollar investments is particularly problematic. It often signals impending financial shortfalls.

We're not just over-reliant—we're wholly reliant—on American technology across the entire stack. Our data sits in American cloud infrastructure; our hardware is American designed; our software and operating systems are overwhelmingly American; most of the AI systems people interact with are American, and so on.

Most great sellers and leaders figure out the things they love about their job – what they would do for free – and set up the infrastructure to intentionally avoid the parts that force them to show up inauthentically.

The easiest way to understand noise is by thinking about measurements. The variability of the error is noise – and that's important. In the mathematics of accuracy, the expression for total error is very simple and quite compelling. It is bias-squared plus noise-squared.

The real scarcity today is attention to the importance of the question, to what end are we deploying this capital. The knowledge age economy is aspirational and that is where I believe we should aim for as we are clearly not there yet. We are in a limbo now, an interregnum phase and this is when everything is particularly unsettling.