“The miracle of the world…the biggest thing that the English are doing anywhere.”

O interview (2003)
Context: I want to direct a movie in Mexico, in Spanish. The story is about how when we're really young, our dreams are colorful and big and abstract and interesting and imaginative. As the realities of life hit, our dreams become so common. To dream big doesn't necessarily mean to imagine becoming the biggest movie star in the world. Dreaming big is about taking the simplest thing in life and enjoying it — and seeing it as the biggest thing that can possibly exist. … I work in an industry that is the first to kill this ability because everything is so celebrity oriented. I am part of a cancer. In my world, you have to be so beautiful, so skinny, so rich, so famous — and I don't believe you really have to be any of those things. You simply have to be who you are.

The Columbia River Collection (1941), Biggest Thing That Man Has Ever Done
Variant: The world is digging, slavery's grave and when the job is done
This'll be the biggest thing that man has ever done.
Context: I'd better quit my talking, 'cause I told you all I know,
But please remember, pardner, wherever you may go,
The people are building a peaceful world, and when the job is done
That'll be the biggest thing that man has ever done.

1990s, Prison interviews and interrogations (1995)

Source: I Capture the Castle

Speech at the ninth World Islamic Economic Forum in 2013 - "World Islamic Economic Forum: Prime Minister's speech" Gov.uk (29 October 2013) https://www.gov.uk/government/speeches/world-islamic-economic-forum-prime-ministers-speech
2010s, 2013

Concluding a private address at the Tokyo G8 summit; July 12, 2008; http://www.telegraph.co.uk/news/worldnews/2277298/President-George-Bush-'Goodbye-from-the-world's-biggest-polluter'.html
2000s, 2008