Note that the person you're replying to did not say that the bible was ALL timeless wisdom, or really say much at all about the overall quality of the bible.
There's no contradiction between the bible containing lots of timeless wisdom AND containing lots of utter nonsense and complete bollocks.
Even as somebody who is an atheist and who generally finds religion to be a blight on our society, I think one can find "timeless wisdom" in the bible mixed in with the other stuff. Whether that, on balance, makes it worth investing time in or not is another question.