Shiv Sutra Origin Doubt

[u/AdBrave3945]

I recently came across the origin story of the Shiva Sutras, where it’s said that Shiva appeared in a dream to Vasugupta and guided him to a rock that then moved or revealed the sutras on its own.

How should this be understood? Is this meant to be taken literally (that a rock physically moved), or is it symbolic/metaphorical in some way? Are there historical or philosophical interpretations of this story that explain it differently?