Dr who cosmology

What is the famous line from Dr Who?
“I am and always will be the optimist.
The hoper of far-flung hopes, and the dreamer of improbable dreams.” – 11th Doctor.
The above quote is my all-time favorite..
Given that the artificialy created universes can create further universes, it is possible that there are an infinite number of universes.
By the end of the Universe over 100 billion alternate versions of history will have been created.
In the post-War universe, the Council of Eight attempted to effect a new anchoring of a Web of Time, but overshot and caused a collapse that left their specific version of history as the only extant reality in the Doctor's multiverse.

What is the famous line from Dr Who?