I never saw my grandfather because he had died before I was born, but I have good memories of my grandmother and of how she could play the piano at the old house.

I know that if I could really understand mental illness, then it would be appropriate to make a big career shift. I would become a therapist and a leader in terms of mental illness. But I'm not in the position.

I had been offered fellowships to enter as a graduate student at either Harvard or Princeton. But the Princeton fellowship was somewhat more generous, since I had not actually won the Putnam competition... Thus Princeton became the choice for my graduate study location.

As a graduate student I studied mathematics fairly broadly, and I was fortunate enough, besides developing the idea which led to 'Non-Cooperative Games,' also to make a nice discovery relating to manifolds and real algebraic varieties.

When I look at the success of the Cisco Networking Academy program, which has reached more than 4.75 million people since 1997, I know it could have never achieved this scale without our partners. Together we provide the tools, equipment and training for our students and teachers.

The chief executive officer is also the chief sales officer. He or she is responsible for the success of the company and making a profit. The closer the CEO is to the everyday selling process, bringing in business, the more successful the company will become.

Sticking to good habits can be hard work, and mistakes are part of the process. Don't declare failure simply because you messed up or because you're having trouble reaching your goals. Instead, use your mistakes as opportunities to grow stronger and become better.

I believe you have a responsibility to comport yourself in a manner that gives an example to others. As a young man, I prayed for success. Now I pray just to be worthy of it.