“Everything has to be at once for six-month-old puppies, six-year-old children, and reformers of any age.”
A Slave is a Slave (1962)
Context: Oh, he won't think of it in those terms. He'll be preventing me from sabotaging the Emancipation. He doesn't want to wait three generations; he wants to free them at once. Everything has to be at once for six-month-old puppies, six-year-old children, and reformers of any age.
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H. Beam Piper 11
American science fiction writer 1904–1964Related quotes

TED Conference http://www.ted.com/talks/sir_ken_robinson_bring_on_the_revolution.html (2010)

“If you can't explain it to a six year old, you don't understand it yourself.”
Variant: If you can't explain it to a six year old, you don't understand it yourself.

“I am a hundred and forty six years old and this is not my first unwinnable war.”
Source: City of Heavenly Fire

Asimov Laughs Again (1992)
General sources

Miss Manners' Guide to Excruciatingly Correct Behavior

“Can you giggle while racing for your life and protecting a six-year-old? I can.”
Source: Maximum Ride The Angel Experiment