Managers are responsible for setting workplace policies under which teachers can succeed. Managers are responsible for negotiating contracts that create the conditions under which teachers can succeed.

I don't see myself as a great discoverer of artists, like Charles Saatchi.

I don't think it makes any sense for an individual to invest in common stocks unless they know the company, work at the company, and so on.

I've never been one who enjoys maintaining the status quo. I'm always pushing for new ideas, whether it's in business or philanthropy.

Oprah Winfrey's global influence is unparalleled. Not only has her generosity and firm belief that education is the key to a better life benefited countless women and children around the world, but her example has also inspired millions of people to give back in ways big and small.

Research – and using what you learn from it to analyze every situation – is what separates being unreasonable from being irrational.

Who you spend your life with-much more so than how you choose to spend it-is the most important decision you can make. Do it right. That's the best advice I can give you.