damn he's a bit of fathead :s !
I asked him something after completing the main quest, and Vivec says who am I to question the will of a god? I'm like, be-atch, you were my advisor back in the day, so don't talk shizzy ta me.
Then I drew my mighty enchanted iron dagger and bested the Saint Vivec. Afterwards I had bittergreen tea and napped(forever) beside a cozy fire in a campsite west of Khuul.