The job of the court is to look to the constitution, as written. They do not need any moral guidance, either from "evolving standards of decency", or the Bible. It ain't their job.
Since all Laws are legislated morality and the Founders made it abundantly clear the role morality plays in our government and its institutions; how can SCOTUS function without moral guidance?
True. Unfortunately, the oligarchs are seeking to legislate immorality from the bench.
” ... and the Founders made it abundantly clear the role morality plays in our government and its institutions ...”
And they wanted the actual legislators to be elected— vetted by the voter [and the senate to be appointed by the state legislators in the early days].
” ... how can SCOTUS function without moral guidance? ...”
They're taught moral relativism these days. Considering the Kelo decision, I think that moral relativism isn't working.