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My Greek instructor taught that the best way to learn Greek is to learn English. I have found it worthwhile to study every word very analytically. See it, say it, use it in a simple sentence. Find it's origin and every use since it was coined. It makes for better communication--provided the reader/listener is familiar with the same jargon and set of definitions. Local idiom can be real confusing to anyone but the locals. English has a lot of homonyms. Nothing like a good brainstorming session.
An interesting point about the Koine Gk., the language of the NT: the Roman Legions spoke the Common or Koine Gk. Not sure how many could read it. However, the spoken Word is all the Holy Spirit needs to convict of sin, righteousness and judgement to come. "Faith comes by hearing, hearing the Word of God."
Sorry this is a bit off course.
Even so, come, Lord Jesus.
Bro. James