There's no such thing as a "timeless" translation - if you read something written by Victorians you'll get all sorts of overlaid assumptions and biases, just ones that are unfamiliar
They didn't say they wanted a timeless translation.
Continually revising a text to be modern and context-aware would indeed make it timeless.
For me, that unfamiliarity is precisely the point of reading something ancient.
Then you need to read the original. A translator is a product of their time.