Romans 3:3-4 : For what if some were without faith? shall their want of faith make of none effect the faithfulness of God? God forbid: yea, let God be found true, but every man a liar; as it is written, That thou mightest be justified in thy words, And mightest pre-van when thou comest into judgment. God had promised to bless the Jews. If he failed to bless them, even though they sinned, would he not be false to his promise? Would their lack of faith interfere with God's promise? But God's promises are conditional. No matter what theories people may have, we must let God be true, even if we must regard all theories as false and every man a liar. Only in that way can we be justified in our words and prevail when we come into judgment.