Theon vs Theos

Greek word is used in both occurrences of the word "God" in John 1:1. This same word is used in many contexts, whether it refers to the Only True God or whether it is referring to a false god - such as a man-made god (1 Cor. 8:5) or Satan as the ‘god of this age’ (2 Cor. 4:4). The apparent differences in spelling between the word ‘God’ in the phrase ‘and the Word was God’ (‘theos’) and in other places, (even in the previous phrase, ‘and the Word was with God’ (‘theon’)) is due to inflection in the Greek language. Each Greek noun normally has 8 or 9 forms (cases & number) in which it can appear. (See my page on ‘Inflection’ and ‘Cases’ on the Web site). In the first instance in John 1:1 it is the object of preposition and thus is in the accusative case. In the phrase in question, it is in the nominative case (indicating the subject or predicate nominative - equal to the subject). But it is the same word for ‘God’, and in both phrases here indicates the One and Only True God. So the apparent difference is spelling is not because ‘theos’ is a different word than ‘theon’, but is a different form of the identical word. There is no definite article in front of the word ‘God’ (‘theos’) in the phrase ‘and the Word was God’. The confusion arises from an assumption that if there is no definite article in the Greek, then it must have an indefinite meaning and thus should be translated with the indefinite article "a". Based on this understanding, some argue that this phrase in John 1:1 should be translated "the word was a god," rather than "the word was God." It is important at this point to understand that the Greek language has a definite article (‘the’), but does not have an indefinite article (‘a’ or ‘an’). In certain instances, when the Greek omits a definite article, it may be appropriate to insert an indefinite article for the sake of the English translation and understanding. But we cannot assume that this is always appropriate. Greek does not operate in the same way as English does in regard to the use of the words ‘the’ and ‘a’. In many instances in which English would not include the word ‘the’, the Greek text includes it. (We don’t see it in the English translations because it would sound non-sensible in our language.) (See Note 1, below.) And in many cases where the Greek omits the definite article, the English translation requires it to convey the correct meaning of the Greek. (See Note 2, below.) Therefore it cannot be assumed that if the definite article is absent, then an indefinite article should be inserted. (For a clear illustration of this, see an example of the use of the word ‘God’ and the definite article in John chapter one.) Furthermore, even though the Greek language does not have an ‘indefinite article’ like we think of in English, there is a way in Greek for the writer to indicate the indefinite idea and thus avoid confusion. This is done in Greek by using the Greek indefinite pronoun ‘tis’.
In John 1:1 there is no definite article in front of the word ‘God’ in the phrase, ‘and the Word was God’. However, in this instance, it cannot just be assumed that the word ‘God’ is meant to be ‘indefinite’, and therefore an indefinite article used in the English translation. Because the first use of the word ‘God’ in John 1:1 (‘the Word was with God’) clearly refers to the Only True God, the Eternal Pre-existent Creator, more than likely John would have used a different Greek construction than he did if he had meant for this next phrase (‘and the Word was God’) to refer to a ‘lesser’ god, and did not want us to confuse this with the True God he had just mentioned. If John meant to avoid confusion, when making such a definitive statement, he could have done so by using this ‘indefinite pronoun’ (‘tis’) as an adjective. This would have made it clear that the Word was ‘a certain god’, but not the one he was just referring to. For examples of this, see the verses Mark 14:51, Luke 8:27, Luke 1:5, and Luke 11:1 (among many, many other examples). So, it seems that by the Greek grammatical structure in this statement, John is indicating that the Word (Jesus Christ - John 1:14) is the same essence and nature as God the Father.