What does Paul mean by the grace of our Lord Jesus Christ?

When Paul mentions the grace of our Lord Jesus Christ, he encapsulates the essence of Christian salvation and relationship with God. This grace is not merely a concept but a profound reality that believers live out each day. He writes in 2 Corinthians 8:9 that though Christ was rich, for our sakes, He became poor, highlighting the cost of His grace. It signifies not just a one-time act but ongoing support and sustenance in a believer's life. This grace assures believers that they are accepted and loved regardless of their failures. It empowers them to face life's challenges, knowing that God's unmerited favor is always with them, thus fostering a deep sense of security and identity in Christ.