"What I hope is in five years' time, I can go to the British people in the election and say: Lots of you doubted that coalition politics worked, but it has worked."

"I don't want to clip on the armour every morning. I've seen some politicians do this and they get a bit mangled and bitter. I just refuse to do that. I refuse to be angry or bitter or complain, and I remain open. I may sometimes be a bit too open but I'm not going to change that one bit."

"The UK is not going to leave the European Union. Of course not. We are inextricably wound up with Europe. In terms of culture, history and geography, we are a European nation."

"I don't watch a huge amount of telly. I read a lot. I'm reading at the moment 'Freedom,' by Jonathan Franzen, a great big brick of a book, and I'm loving it."

"Imagination is everything. It is the preview of life's coming attractions."

"The idea of having Australians upset at me is just awful."

"The best scientist is open to experience and begins with romance - the idea that anything is possible."

"Our thoughts and imagination are the only real limits to our possibilities."