If you want to make a big positive impact in the world, focus on being useful to your fellow human beings and society.

Aspire to do true work that is useful to as many people as possible. It's incredibly difficult to achieve, but if you focus on being useful, your probability of success is much higher.

My broad operating principle is to be of service, which shifts the focus from what I accumulate to what I contribute to my company and society.

To have an impact, focus on the intersection of what you're good at, what you enjoy, and where you can create value for the world.

My mission has shifted from grand statements to simply asking how I can help others, focusing on service rather than proving myself.

Life is too short to waste time in school when there are 7 billion people on Earth; I wanted to contribute to something meaningful and believed starting a company was the fastest way to make progress.

Success for me is having a positive impact on others, whether through business, nonprofits, or government service.

I hope my legacy is a net positive on the world, impacting billions of people in a meaningful way, similar to what Steve Jobs and Elon Musk have achieved.

Do something you care about with people you believe in, and focus on what you can contribute. That's how you make a difference.