Shall I say "the God" or just "God"?
This is a mere grammar question.
The proper word to use is God. When you add the word the to the sentence, then it would mean that you are referring to an object or someone who is inferior.
It depend which God you are talking about. If you mean the Christian/Jewish God, then just 'God' is correct.
Of any religion you are say only 'God'. It makes others feel as if you have equal importance for all religions you will feel good too.
It depends on the context, whether as an exclamation, a query or your belief. You will have to be more specific.
yes "God" is right by since the romans and servants didn't speak proper english they would say "the god waits as shall hurry" something like that. but it really matters on the context of what your doing or reading.
Just god. Even in Greek where they add the before a persons name example the marry.
It depends on the text. "The God of the heavens" works. If you're actually talking to him, do not use "the."