'O God' in the Bible

Is that appealing to men's weaknesses, or to God? Is that trying to suit men? If I were still doing that, I would be no slave of Christ.

And they gave glory to God on my account.

For I through the law am dead to the law, that I might live unto God.

Is the law therefore contrary to God’s promises? Absolutely not! For if a law had been given that was able to give life, then righteousness would certainly be by the law.

So you are servant no longer but son, and as son you are also heir, all owing to God.

Howbeit then, when ye knew not God, ye did service unto them which by nature are no gods.

Would to God that those who are unsettling your faith would even mutilate themselves.

So then, while we [as individual believers] have the opportunity, let us do good to all people [not only being helpful, but also doing that which promotes their spiritual well-being], and especially [be a blessing] to those of the household of faith (born-again believers).

And as many as walk according to this rule, peace be on them, and mercy, and upon Israel that pertaineth to God.