Sha Ka Ree is the name of the Vulcan concept of Heaven.

Sybok, the half brother of Spock, believed that God lived on Sha Ka Ree which was located in the center of the galaxy, inside the Great Barrier. Unfortunately, he only encountered a powerful energy being that masqueraded as a deity which was imprisoned in the location and attempted to escape. (TOS movie: Star Trek V: The Final Frontier)

This entity is known as The One.

It is possible that Sha Ka Ree is a concept that is pre-Surak and was worshipped by the early Vulcan people