From an interview with Daniel B. Wallace, there is this question and Dr. Wallace’s response
Lastly, if there is one piece of advice you could give to someone entering New Testament Greek scholarship, what would it be?
Work on your languages hard. Without a solid foundation in Greek and Hebrew—and for doctoral students—German and French and/or Latin, Coptic, and Syriac—you can’t have an influence on biblical studies. It’s imperative that you take language acquisition and maintenance very, very seriously.
Well, I’m working hard on my Greek, as you can probably tell. I had some French in high school, and I do have a book on Coptic that I plan to read at some point. I definitely have plans to learn Hebrew, after I reach a certain point in my Greek studies. Where that point is, I don’t know. I suppose I’ll know it when I see it.
As for picking up German, Latin or Syriac, or of advancing in French… I need 63 hour days… 😦