“We lived like that “Happy Family“ you sometimes see in traveling zoos: a lion caged with a lamb. It is a startling exhibit but the lamb has to be replaced frequently.”
Source: Have Space Suit—Will Travel (1958), Chapter 7
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Robert A. Heinlein 557
American science fiction author 1907–1988Related quotes

“And so the lion fell in love with the lamb…”
he murmured. I looked away, hiding my eyes as I thrilled to the word.
"What a stupid lamb," I sighed.
"What a sick, masochistic lion."
Edward Cullen and Bella Swan, p. 274
Twilight series, Twilight (2005)

Affurisms: Slips of the Pen http://books.google.com/books?id=Wpk_AAAAYAAJ&q="The+lion+and+the+lamb+may+possibly+sumtime+lay+down+in+this+world+together+for+a+fu+minnits+but+when+the+lion+kums+tew+git+up+the+lamb+will+be+missing"&pg=PA227#v=onepage The Complete Works of Josh Billings (1876)

“Though lions to their enemies they were lambs to their friends.”
The infernal Marriage, part 2, Chapter 4 (1834).
Books

“I've always liked, someday the lamb will lay by the lion…. but it won't get much sleep.”

“I know an Englishman,
Being flattered, is a lamb; threatened, a lion.”
Alphonsus, Emperor of Germany (1654), Act I, scene ii, lines 208–209. Attributed, probably falsely, to Chapman. Perhaps by George Peele.
Disputed

Edward Cullen and Bella Swan, p. 274
Twilight series, Twilight (2005)

The Notebooks of Leonardo da Vinci (1883), XX Humorous Writings