 And he reminds us in various places in the New Testament that he doesn't presume to have a lock on salvation. He knows God will be true to his promises, and he's confident that he will go to heaven, but he doesn't have absolute certitude, as he talks about here in 1 Corinthians 4. So he tempers that certitude of God's promises and his desire to see God face to face with recognition of his own unworthiness.