The best thing on translation was said by Cervantes: translation is the other side of a tapestry. (Leonardo Sciascia)

Alternatively, according to Robert Frost, poetry is what gets lost in translation.

For those of you busy in the field of translation and interpreting, have  a look at this blog which has a great sense of humour and is perfect for when you need cheering up, and this one which has a lot of links and leads to interesting resources that may come in very handy.