it's very easy to take more than nothing.

"but Alice had got so much into the way of expecting nothing but out-of-the-way things to happen, that it seemed quite dull and stupid for life to go on in the common way.

...

'Would you tell me, please, which way I ought to go from here?'
'That depends a good deal on where you want to get to,' said the Cat.
'I don't much care where -' said Alice.
'Then it doesn't matter which way you go,' said the Cat.
'-so long as I get somewhere,' Alice added as an explanation.
'Oh, you're sure to do that,' said the Cat, 'if you only walk long enough'

...

'I've had nothing yet,' Alice replied in an offended tone, 'so I cant take more.'
'You mean you can't take less,' said the Hatter: 'it's very easy to take more than nothing.'

...

'I couldn't afford to learn it.' said the Mock Turtle with a sigh. 'I only took the regular course.'
'What was that?' inquired Alice.
'Reeling and Writhing, of course, to begin with,' the Mock Turtle replied: 'and then the different branches of Arithmetic - Ambition, Distraction, Uglification and Derision.'"

-- Alice's Adventures in Wonderland, Lewis Carroll