English to Spanish Art/Literary Psychology the discovery of one\'s vocation...

I need to translate the word "witness" used in a special sense, somewhat akin to a "Jehovah's witness" (But definitely not related to that theology).

Here is the passage:

A knowledge of myth is crucial to a knowledge of vocation. In some way vocation is an enterprise, an enterprise of service or discovery, and the moment it becomes that, it becomes mythic. It is this dimension which changes vocation from career to witness.

I have this:


Un conocimiento del mito es crucial (o indispensable - no decido todavía) para conocer tu vocación. De alguna manera, una vocación es una empresa – una empresa de servicio o descubrimiento, y el momento en que se convierta en eso, se vuelve mítica. Es esta dimensión que convierte la vocación de una mera carrera en un ... ...testimonio

But I'm sure that's not right. Maybe "presenciamiento" o "presenciar"? "Se convierte en un presenciar"?

I will rely on the advice of those fortunate enough to be native speakers of the language!

Thanks,

Bob