"promise me no promises"

saw this in someone's messenger status

quite cryptic

and did a search using google

found this one:

http://classiclit.about.com/library/bl-etexts/crossetti/bl-crossetti-promise.htm

Promises Like Pie-Crust
by Christina Georgina Rossetti
(1830-1894)

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Promise me no promises,
So will I not promise you:
Keep we both our liberties,
Never false and never true:
Let us hold the die uncast,
Free to come as free to go:
For I cannot know your past,
And of mine what can you know?

You, so warm, may once have been
Warmer towards another one:
I, so cold, may once have seen
Sunlight, once have felt the sun:
Who shall show us if it was
Thus indeed in time of old?
Fades the image from the glass,
And the fortune is not told.

If you promised, you might grieve
For lost liberty again:
If I promised, I believe
I should fret to break the chain.
Let us be the friends we were,
Nothing more but nothing less:
Many thrive on frugal fare
Who would perish of excess.

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And I thought... why bother?