Charles H. Spurgeon wrote, "Salvation is the work of God. It is he alone who quickens the soul dead in trespasses and sins, and it is he also who maintains the soul in its spiritual life. He is both Alpha and Omega. Salvation is of the Lord."
Spurgeon understood that God is the beginning (Alpha) and the end (Omega) of our salvation (Revelation 1:8). Alpha is the first letter in the Greek alphabet and omega is the last letter. From beginning to the end, salvation is of of the Lord (Ephesians 2:10).
In our sinful state, we are spiritually dead (Ephesians 2:1). Our sins have separated us from God. Our inability to come to God is our unbelief and hardness of heart. But, God who is rich in mercy, comes to us as sinners with the goodness of grace, leading us to repentance (Romans 2:4; Ephesians 2:4-5).
God's Spirit draws us through the gospel of Christ. The Spirit of grace enables us to believe on the Lord Jesus Christ (Acts 16:30-31; 1 Thessalonians 1:5). God in Christ is the Alpha and Omega of our salvation (Revelation 22:13).
Salvation is of the Lord from beginning to completion in the true believer. He began the good work in us. Likewise, he continues to work in us (Philippians 1:6; 2:13). What God begins in us, God completes in us. He is the Alpha and Omega of our salvation. That is salvation of the Lord.