The Norn-La-Hal was an event experienced by members of the Vulcan race.
It was the time of transition from being a child to being an adult. Once they achieved this state did they get taught the blanket training that all Vulcans took during. This rite involved superior control over meditation and neurological organization. Furthermore, it taught the importance of dignity and the tradition of Vulcan identity with the contemplation of infinity. (TOS novel: Battlestations!)