'City of God' in the Bible

but say you, "if our unfaithfulness displays the veracity of God, what shall we say? is it not injustice in God to inflict punishment?"

"but, say you, if the veracity of God hath appeared more illustrious thro' my unfaithfulness, why then am I condemned as a sinner?

for I tell you, that Jesus Christ was a minister to the Jews, to manifest the veracity of God in fulfilling the promises made to the fathers: