I read something encouraging and thought-provoking this morning written by Sinclair Ferguson in his book ‘In Christ Alone’:
Christ died our death, and now in His resurrection He continues to wear our nature forever, and in it He lives for us before the face of God. He could not do more for us than He has done; we need no other resources to enable us to walk through this world into the next.
I need frequent reminding that I already have in Christ all I need for life and godliness (2 Peter 1:3). The death of Jesus was a perfect sacrifice for sin, such that we now have perfect righteousness in him (Hebrews 10:12-14). As yet we struggle and groan in battle with the sinful nature in us, but by faith in Jesus Christ we are righteous (Romans 3:21-22).
Consider that Abraham was a sinful man (Gen 12:10-20, Gen 16:2-6, Gen 20:1-18), yet he was counted righteous by faith (Romans 4:3) — all he did was to believe what God told him. That is all we have to do — believe in Jesus Christ and we have perfect righteousness!