The first time the Vulcan language is spoken laid the groundwork for Star Trek to develop Vulcan words and rituals in later shows & movies.

It first appeared in Star Trek fanzines in the late 60s and early ... It was also established as the Vulcan art form of examining the contrasting and compatible duality of a subject.

goes missing – that might just prove important later… (Star Trek Beyond) 2230 - Spock is born on Vulcan. 2233 - James T. Kirk is born. He's from Iowa – he only works in outer space.