Born on May 19th

"Once I even took the train to Utrecht, forty miles from Amsterdam, with my yellow star, this star which I still have. Why did I go? I just wanted to visit some friends. I was a little bit crazy, a little bit insane."

"I spent every night until four in the morning on my dissertation, until I came to the point when I could not write another word, not even the next letter. I went to bed. Eight o'clock the next morning I was up writing again."

"Of course, relative citation frequencies are no measure of relative importance. Who has not aspired to write a paper so fundamental that very soon it is known to everyone and cited by no one?"

"One of the absolute rules I learned in the war was, don't know anything you don't need to know, because if you ever get caught they will get it out of you."

"The rule of the game was never assume that anybody, however honorable, would be able to stand up under torture. If Mr. X, who knew where I was, was caught for some reason, I should move."

"One of the things I learned, one of the strangest things, is how to think. There was nothing else to do. I couldn't see people, or go for a walk in the forest. All I had was my head and my books, and I thought a lot."

"Nothing would make me happier than to train the next winner on 'The Biggest Loser' because it means the world to me. Everybody has a fighter inside them, they just don't realize it."

"I like to eat chocolate and pizza - that's my vice! - just like everyone else, but if I do it I have to keep it under control."

"Everyone has a different training style and being a female, sometimes you find you have to get really aggressive. Some people respond really well to aggression, some people don't."

"My background is that of a competitive athlete and a fighter, and I'm bringing something totally different to 'The Biggest Loser' that wasn't there before."

"I'm the type of person who can get a feel for what you need and what I need to do to push you to get you to a breaking point, where you realize that you can't go on this way anymore, that the reason you're heavy is because you're ignoring all the stuff that's going on inside."

"I'm constantly feeding my metabolism. But at the same time if I want to go one night and have a nice dinner then I won't sweat it the next day."

"I'm not a celebrity trainer. I don't have my own line of DVDs, but I'm a fighter and have everything to prove."

"Even though I had been boxing, I had no idea I could beat somebody in the ring. And I had no idea I could really take a punch. When I realized that, I really started taking off."

"I know that when I get stressed, I want to eat junk food. So now I just know - 'I'm stressed, I want to eat junk food, so I'm going to go work out instead, or eat something healthy.' It really works."

"I don't care who you are or what you have gone through - everyone has something they are fighting for."

"If you don't have good horses, it's very tough to win."

"In Argentina, we're surrounded by polo ponies. The farm covers roughly 170 hectares, and there are no cattle or sheep, just horses."

"I'm usually woken up by the birds and by my schnauzer, Rafa - for me that's the best start to the day. I jump out of bed, throw on some clothes, and race to the polo ground."

"We have the best sporting event in the world in polo, and yet it is weak."

"We have two trainers at the polo ground and do a mix of aerobics, gymnastics and stretches before we start riding. As polo players, it's very important for us to keep in shape. We do a bit of yoga and Pilates sometimes, too."

"Buenos Aires is less than an hour's drive from the ranch, and in the evening, we might meet friends for dinner there. I get recognised a bit, but I'm lucky that polo isn't as popular as other sports."

"When I was 12 or 13, I realised I was good, but I never knew how far I'd get."

"I think polo players are at their best in their 30s. You've got the talent and the experience. You play with your head - you learn to lose and how to win."

"I've got nothing to complain about. I have to enjoy and be grateful. Lots of people would like to be in my shoes."

"When you get on a good horse, you just know. They are powerful, they stop quickly, they can turn in both directions, and they are fast."

"Thanks to my father, we were always in good horses."

"I've seen a lot of great players that couldn't get to the top because of horses, and I've seen a lot of normal players that got higher and higher because of horses."

"I'm a healthy weight for my height, and I like how I look on most days."

"Patience is the secret to good food."