Math desires

Do Galileo's words, "nature is a book written in the language of mathematics," hold new meaning for today? The PhysicsWeb essay, The Book of Nature, believes it does and provides this cautionary note:

...the image of the book of nature can haunt us today. One reason is thatit implies the existence of an ultimate coherent truth – a complete text or 'final theory'. While many scientists may believe this, it is ultimately only a belief, and it is far likelier that we will endlessly find more in nature as our concepts and technology continue to evolve

Indeed, why do we speak in terms of unifying realities at all?