Romans 3:3-5

3True, some of them were unfaithful; but just because they were unfaithful, does that mean God will be unfaithful?

4Of course not! Even if everyone else is a liar, God is true. As the Scriptures say about him, “You will be proved right in what you say, and you will win your case in court.”

5“But,” some might say, “our sinfulness serves a good purpose, for it helps people see how righteous God is. Isn’t it unfair, then, for him to punish us?” (This is merely a human point of view.)