What does 'for Christ's sake' mean in a believer's life?

'For Christ's sake' encapsulates the essence of a believer's identity and standing before God. It means that God's kindness and mercy are not based on our worthiness, but are granted through our relationship with Christ. The story of Mephibosheth illustrates this beautifully; he was shown kindness not for his own merits but for the sake of Jonathan. Likewise, we receive grace from the Father because of the covenant made with Christ. This phrase reinforces the truth that we are accepted before God solely based on what Christ has accomplished on our behalf, which is the heart of the gospel message.