‘What’s the point of controlling a universe without meaning, where nothing of any consequence ever happens? Why shed tears when someone dies if they can be brought back, why cheer on your favourite team when if they lose they can also win? I don’t want to be a god.’
‘You are weak.’
The Doctor shook his head. ‘Answer me this, Omega: what’s the opposite of matter?’
‘Anti-matter,’ Omega replied instantly.
‘Wrong, wrong, wrong. The opposite of matter is “doesn’t matter”.’ The Doctor sighed. ‘That’s what we’ve created - a universe where everything is nothing. A universe where nothing matters. Of course you can rewrite history, but you shouldn’t. As long as you have these great powers, nothing is real.’
—  “The Infinity Doctors”, Lance Parkin