Our moral philosophy determines our values - what we care about and what we don't care about - and our values determine our decisions, actions, and beliefs. Therefore, moral philosophy applies to everything in our lives.

I think humility - which I think is a very good value to adopt - is basically an extension of understanding your own ignorance.

If someone is better than you at something, then it's likely because she has failed at it more than you have. If someone is worse than you, it's likely because he hasn't been through all of the painful learning experiences you have.

There's a paradox with self-improvement, and it is this: the ultimate goal of all self-improvement is to reach the point where you no longer feel the need to improve yourself.

Whether you come from a council estate or a country estate, your success will be determined by your own confidence and fortitude.

I definitely will reach out to Cuban in the near future for advice going forward. Now that I'll be on the business side of things - and he's had a lot of success with that - that would be a guy to go to.

Well, I do feel that I carry the responsibility of representing my country wherever I am, and this responsibility came with the success that I had in last couple of years, not just myself but the whole group of tennis players that comes from Serbia. And athletes in general are, in this moment, the biggest ambassadors that our country has.

I've witnessed firsthand the critical role suppliers - and especially the best ones - play in Boeing's success.