And so, I would say yes, I'm optimistic about being able to achieve a victory, but I'm also realistic.
The second reason I'm optimistic is because of the change I saw between 2008 and 2012.
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"I'm quite optimistic and happy that I'm now beginning my new assignment, " Hey told the BBC in Monrovia.
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"I'm still optimistic on WFirst and I'm also very supportive of the Euclid mission and we're doing our best to make sure it happens as well, " he said.
"I'm optimistic, " said Costin Iorgulescu, as we sat in a cafe in the capital Bucharest.
But I'm optimistic that we can make real progress on this front.
"I'm optimistic because we're reusing so much existing technology, " Mr Allen said.
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I'm optimistic and cautious because lots of things can go wrong.
I'm optimistic about our economic future, because Americans have shown time and again that they are the most industrious, creative and enterprising people in the world.
And the reason I'm optimistic is a number of reasons.
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"I'm optimistic that we can find the right balance between security and economic opportunity that is necessary ... and we'll be striving hard to meet those challenges, " Card said.
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"I'm optimistic that we will leave the summit ... with more troop commitments, which is necessary in Afghanistan, " Scheffer told CNN from Bucharest, Romania, where the summit is being held.
I'm optimistic that one or both of the options above will become possible in Windows Phone 8, but that's little help to people like you who are using Windows Phone 7.
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And the reason I'm optimistic is because of you.
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"Overall I'm very optimistic and I think this is a good first step in the direction of allowing some research to move forward, " said Dr. John McDonald, director of the Spinal Cord Injury Unit at Washington University School of Medicine in St.
How often the Universe has planets truly like the earth - true earth twins, planets the size of the earth, rocky planets with a surface that supports liquid water - well, we don't have that number yet, but I'm optimistic we'll figure it out.
"I'm optimistic that we will continue to work with the conservation and heritage lobbies in finding cheaper solutions to roof repairs and temporary solutions that will get a parish church repaired so it can still be used for the purpose they were built for years ago, " the archdeacon said.
Mr. EDWARDS: I guess I'm ultimately optimistic about this, I--and about the country.
"I'm guardedly optimistic that we'll emerge tonight with a good lead, but I'm very superstitious so I'm not predicting anything, " McCain said.
"I'm very optimistic about Africa, but I say it always with a tinge of hesitation because one of the big risks is that we get carried away and therefore forget to talk about the real challenges that are still ahead of it, " he said.
"I'm pretty optimistic this might be just the beginning, " says Daimler AG Chief Executive DieterZetscheDieter Zetsche.
I'm more optimistic about the prospects for Skype, which carries more international voice traffic than any telco.
So I'm very optimistic that we're going to continue to make progress on all of these fronts.
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"I'm pretty optimistic this might be just the beginning, " says Daimler AG Chief Executive Dieter Zetsche .
"I'm still optimistic that humans will decide to deal with greenhouse gases in a realistic fashion, " he said.
"I'm cautiously optimistic about the fact that we're beginning to see green shoots in China, " Mr Albanese said.
"I'm moderately optimistic it will succeed, " says Dr. Giuseppe Giaccone, a lung cancer expert at the National Cancer Institute in Bethesda, Md.
Mr. FLETCHER: I'm not optimistic about any middle class unless we increase the rate of unionization and unless we change the political priorities of this country.
"On the basis of what I heard, the questions of the justices, the response of the participants, I'm very optimistic that DOMA will be struck down, " Pelosi said.
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