"Obviously (it will be) difficult, but we have been doing our work, and we will be successful, " he said.

CNN: Papandreou: Greece won't default on debt

Billionaire philanthropists, people who genuinely care about making the world a better place, have found that doing so is difficult.

FORBES: Yes, Gawker, 'The Good Rich' Do Exist

Unlike Jack, whose choices have been mostly reflexive, Mr. Clooney and his director have opted to take many risks in doing this difficult film.

WSJ: Movie Reviews for 'The American,' 'Mesrine': George Clooney Compels, Vincent Cassel Rivets

Some newspaper commentators have claimed it is difficult for Alba to show it is doing this, as normal viewing figures are not available for the station.

BBC: New Freeview chapter for BBC Alba

They have no idea though that what you are doing is a terrifically difficult thing to do.

FORBES: Joan Rivers' Celebrity Business

As it would be difficult and risky there would have to be very good reasons for doing this.

BBC: Genetic advance raises IVF hopes

The two of them together have paired up to do an extraordinarily difficult task, but they are doing it extraordinarily well and we are proud of them.

WHITEHOUSE: President Obama��s Surprise Visit to Afghanistan

But I have every confidence that if we are willing to continue doing the difficult work that must be done -- by each of us and by all of us -- then we will leave this struggling economy behind us, and come out on the other side, more prosperous as a people.

CNN: Obama's remarks on signing the stimulus plan

No matter how large your differences may be, doing so will only harden positions and make it that much more difficult to have productive follow-on discussions.

FORBES: Trump Off Base