Testimony gives something to be interpreted.
First, it is not unimportant that the legislative texts of the Old Testament are placed in the mouth of Moses and within the narrative framework of the sojourn at Sinai.
There has always been a hermeneutic problem in Christianity because Christianity proceeds from a proclamation.
Testimony should be a philosophical problem and not limited to legal or historical contexts where it refers to the account of a witness who reports what he has seen.
The moral law commands us to make the highest possible good in a world the final object of all our conduct.
It is always possible to argue against an interpretation, to confront interpretations, to arbitrate between them and to seek for an agreement, even if this agreement remains beyond our reach.