It's this idea of destiny or the one true calling, the idea that we each have one great thing we are meant to do during our time on this earth, and you need to figure out what that thing is and devote your life to it.
Esa idea do destino ou da vocación. A idea de que todos estamos destinados a algo grande durante  o noso paso por esta terra, e tes que descubrir que cousa é e adicarlle a túa vida.