Pure mathematicians just love to try unsolved problems - they love a challenge.
Andrew Wiles

But it is a delightful challenge to try to depict interesting aliens.
David Brin

Let me just tell you how thrilling it really is, and how, what a challenge it is, because in 1988 the question is whether we're going forward to tomorrow or whether we're going to go past to the - to the back!
Dan Quayle

I would have to challenge the term, modern dance. I don't really use that term in relation to my work. I simply think of it as dancing. I think of it as moving.
Twyla Tharp

I have the wherewithal to challenge myself for my entire life. That's a great gift.
Twyla Tharp

There were certainly things I was scared to do, but I never thought I wasn't up for the challenge.
Rooney Mara

As a 22-year Army Veteran who served in Operations Desert Storm and Iraqi Freedom, and as a Civilian Advisor to the Afghan Army in Operation Enduring Freedom, I understand both the gravity of giving the order, and the challenge of carrying it out.
Allen West

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

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 work with structure, but I go outside the box and give it my own spin. I adore the challenge of creating truly modern clothes - where a woman's personality and sense of style are realized.
Vera Wang

I adore the challenge of creating truly modern clothes, where a woman's personality and sense of self are revealed. I want people to see the dress, but focus on the woman.
Vera Wang

Fashion offers no greater challenge than finding what works for night without looking like you are wearing a costume.
Vera Wang

The challenge is to manage the Web in an open way-not too much bureaucracy, not subject to political or commercial pressures. The U.S. should demonstrate that it is prepared to share control with the world.
Tim Berners-Lee

My biggest challenge was to make sure that the songs I did were who I am.
Justin Timberlake

Acting is always a challenge.
Robert Downey, Jr.

I'm more focused and have a greater sense of challenge, because I constantly feel the weight of time.
Sylvester Stallone

I'm hungrier than those other guys out there. Every rebound is a personal challenge.
Dennis Rodman

It's a big challenge for me to keep my integrity and some of my privacy intact.
Sarah McLachlan

They're simply following what was laid down in front and they play the same thing. So, there's no great challenge In being a classical drummer.
Buddy Rich

Perhaps the greatest challenge has been trying to keep my time to myself and my private life private in order to do my job. Everything that is most mine belongs to everyone now.
Sandra Cisneros