Markos wrote:Attic and Koine are the same language. Learning one is very helpful in learning the other. If you can, by all means take that seminary course in NT Greek.
If they are the same language why learning one of them is only "helpful" and not "equal" to learning the other?
Attic and Koine are two different parts of the evolution of a language. There is a difference of over 500 years between classical authors and Vulgate, so the language couldn't, by any means, remain the same. They are both quite similar nevertheless. The year spent learning Koine certainly wouldn't be a waste and a decent start on your way to reading Plato.