I really started writing music to challenge myself, to see what I could write.

- Amy Winehouse

If you do a quantity challenge, the problem you'd face would be a starchy challenge. If it has a lot of potatoes, a lot of bread or fried elements, that's difficult. With heat challenges, challenges that use the whole pepper are much, much easier than ones that use pepper extract. That's concentrated, and also devoid of flavour. It's just heat.

- Adam Richman

There's no way that I could have known about a 72-oz. steak challenge in Amarillo unless thousands upon thousands of locals and travellers alike had attempted it. I guess if 'Man V Food' is me paying homage to these legends, then I suppose 'Man V Food Nation' is the legacy.

- Adam Richman

The more dollars the studio producers put in, the less freedom we have. If the budget hits $100m, they get scared - they'll take the existing score of a successful movie and expect composers to copy it, like wallpaper. The biggest challenge for any composer in Hollywood is to be as creative as possible within those boundaries.

- A. R. Rahman

The danger sensation is exciting. The challenge is to find new dangers.

- Ayrton Senna

The secret of concentration is the secret of self-discovery. You reach inside yourself to discover your personal resources, and what it takes to match them to the challenge.

- Arnold Palmer

It was a challenge, to work with Oliver Stone.

- Anthony Hopkins

The challenge in a startup is you hit a lot of turbulence, and you want people who understand that it's just turbulence and not a crisis.

- Anne Wojcicki

I've been motivated by overcoming challenge and overcoming the hurdles and obstacles that face me. There still is plenty out there to get motivated by.

- Andre Agassi

It has meant a lot to me to challenge the best players in the world and to beat them. And it means a lot to me to be out here and fighting for the title and, you know, it hurts not to win it.

- Andre Agassi

To become 'unique,' the challenge is to fight the hardest battle which anyone can imagine until you reach your destination.

- A. P. J. Abdul Kalam

Something that's fun for me is a challenge. When you have a challenge and you take on that challenge and succeed, that's the best feeling.

- Amy Lee

Time passes faster and faster, but with every project I always want to find the next challenge and the next challenge is just as exciting as the previous one.

- Alexander Wang

My style is not to challenge anything.

- Alex Rodriguez

Then there was the challenge to keep doing better and better, to fly the best test flight that anybody had ever flown. That led to my being recognized as one of the more experienced test pilots, and that led to the astronaut business.

- Alan Shepard

I feel that the great challenge of our time is the communication of ideas.

- Alain de Botton

Our world faces a true planetary emergency. I know the phrase sounds shrill, and I know it's a challenge to the moral imagination.

- Al Gore

I love challenges, I love intensity, and I also like to challenge my mind. Believe it or not, boxing is not only about physical force. You use a lot of concentration; it's really mental.

- Adriana Lima

History is made every day. The challenge is getting everyone to pay attention to it.

- Adora Svitak

And as an American colleague said to me several months ago, he said, 'I think the challenge in Jordan - and, again, this is for the rest of the Middle East - we need to define what center is. And once we can define what center is to a Jordanian, then we can decide what's left and what's right of that.

- Abdullah II of Jordan