Piper defends the traditional view of justification/imputation and argues that justification gets reckoned at the moment of faith, not a declaration that awaits the completion of the life lived. He also heralds that the gospel (the good news of how one enters into a relationship with Jesus Christ) is firmly seen in justification.
Here are Piper's ideas that I think are worthy of special mention:
1. The definition of righteousness: (pages 69-70) By far the most helpful piece of work Piper does is define what righteousness is. Wright argues that God’s righteousness is simply God’s faithfulness to His the people of His covenant. This is why Wright thinks it’s silly to think humans take on God’s righteousness . . . how can humans take on HOW God interacts with humans (yes, it just sounds silly). But Piper argues (convincingly I think) that righteousness is more than what God does. Yes, the righteous God is faithful to His covenant. But the righteous God also punishes the wicked. The righteous God upholds creation. So what is righteousness?? Righteousness is “his unwavering commitment to act for the sake of his glory” (page 68). That’s why when humans disobey God they are called unrighteousness . . . they exchange (or waver in their commitment to) the glory of God for wickedness (see Romans 1-3).
answers 2-3 next post . . .