Martyn Lloyd-Jones wrote, "It is grace at the beginning, and grace at the end. So that when you and I come to lie upon our deathbeds, the one thing that should comfort and help and strengthen us there is the thing that helped us in the beginning. Not what we have been, not what we have done, but the Grace of God in Jesus Christ our Lord."
God's grace is unmerited favor for every believer. That's the grace of God in Christ alone. It is the gift of God that can only be received by faith (Ephesians 2:8-9). Grace is not what we have done, but what God has done for us in Jesus Christ our Lord.
God's grace is salvation in Christ. "And of His fullness we have all received, and grace for grace" (John 1:16). God's grace is in Christ dying for our sins (Hebrews 2:9). God's grace is at the empty tomb. He is risen for our justification (Romans 4:25). He lives as our sanctification (1 Peter 1:2). He is coming again for our glorification (Romans 8:30). The fullness of grace is in Jesus Christ our Lord.
Lloyd-Jones was saying that the Christian life is the fullness of grace in Christ. It is grace in three tenses, past, present and future. He said, "The Christian life starts with grace, it must continue with grace, it ends with grace." Salvation is the fullness of God's grace in Christ, from the beginning unto the end..