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The best translations I've seen (Dante's Commedia, Beowulf) have the original and the translation together. That way you can read what the sense of the text is, but if you want, you have the origin...
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#4: Attribution notice removed
Source: https://writers.stackexchange.com/a/8822 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/8822 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
The best translations I've seen (Dante's _Commedia_, _Beowulf_) have the original and the translation together. That way you can read what the sense of the text is, but if you want, you have the original for check (or so you can translate it yourself if you can). If the quoted verse improves yours, by all means include it.