New Testament Greek for Beginners

(Based on the book with the same title by Gresham Machen, The MacMillan Company, 1923)

References

311. Certain nouns, referring to persons or things which instead of being only one of a class are quite unique, are treated as proper nouns, the article being either inserted or omitted. So θεός or ὁ θεός, God; πνεῦμα or τὸ πνεῦμα, the Spirit; κόσμος or ὁ κόσμος, the world; νόμος or ὁ νόμος, the Law.