Tennis is all about mental toughness and you have to keep your head in the game. I make time to relax away from competition pressures travel and intense training schedules to make sure I'm looking after myself. Taking time out with family and friends helps to maintain the work-life balance everyone needs.

My job is to be a spokesman - the spokesman I suppose - for the President for the White House to do the daily briefings to manage the press corps in terms of travel day-to-day needs access interviews all those issues.

Because when you have millions of people with this kind of need for gratification and the culture is saying that it's possible for everyone to satisfy all of their needs and desires all of the time there are obviously going to be clashes - clashes of ego.

I love going to Africa and stuff. I love going anywhere really but I've been to Africa a bunch of times and it's just a beautiful place that needs help obviously but helping people that are really thankful is really easy to do. And the people out there always seem so thankful.

I think every student needs access to technology and I think technology can be a hugely important vehicle to help level the playing field.

What the public needs to understand is that these new technologies especially in recombinant DNA technology allow scientists to bypass biological boundaries altogether.

Lucky individuals in each generation find technology appropriate to their needs.

The most important and urgent problems of the technology of today are no longer the satisfactions of the primary needs or of archetypal wishes but the reparation of the evils and damages by the technology of yesterday.

What the country needs are a few labor-making inventions.

What a blind person needs is not a teacher but another self.