Romanos 2:3

And reckonest thou this, O man, who judgest them that practice such things, and doest the same, that thou shalt escape the judgment of God?

Thus the second of the ten principles is:

II. People will be judged according to the Bible.

This verse makes it clear that Paul's real subject in this paragraph is the judgment of God and the basis upon which same will be executed. Those persons who thought that God's Judgment would ever be exercised upon partial and unequal judgments were fantastically wrong. Paul here exclaimed in utter astonishment at the foolishness of persons who fancied that they might escape the judgment of God when they were condemned even by their own consciences, a self-condemnation just mentioned in verse 1. If a man cannot escape his own judgment against himself, how could he ever hope to stand before the holy God? As Wuest expressed it:

The Jew certainly thought, in many cases, that the privilege of his birth would of itself assure his entrance into the kingdom (Matthew 3:8-9), this having been his practical conviction, whatever was his proper creed.[7]

It was for the purpose of refuting such widespread errors regarding God's judgment that Paul sternly propounded the true principles of it in these verses.