Neither son loved the father for himself. They both were using the father for their own self-centered ends rather than loving, enjoying, and serving him for his own sake. This means that you can rebel against God and be alienated from him either by breaking his rules or by keeping all of them diligently. It 's a shocking message: Careful obedience to God's law may serve as a strategy for rebelling against God .
Timothy KellerGod's grace and forgiveness, while free to the recipient, are always costly for the giver. From the earliest parts of the Bible, it was understood that God could not forgive without sacrifice. No one who is seriously wronged can โjust forgiveโ the perpetrator.
Timothy KellerI've heard plenty of Christians try to answer the why question by going back to the what. "You have to believe because Jesus is the Son of God." But that's answering the why with more what. Increasingly we live in a time in which you can't avoid the why question. Just giving the what (for example, a vivid gospel presentation) worked in the days when the cultural institutions created an environment in which Christianity just felt true or at least honorable. But in a post-Christendom society, in the marketplace of ideas, you have to explain why this is true, or people will just dismiss it.
Timothy KellerChristians tend to motivate others with guilt. We tend to say: You would do this if you were really committed Christians, indicating that we are committed and all that is needed is for others to become as good as we are! This is why so many churches quench the motivation of people for ministry. In our shoes, Paul would say: Remember the grace God has showered on youโwhat does living out and enjoying that grace look like in this situation?
Timothy Keller