2:20 crucified with Christ. Here is the great secret of a Christ-honoring Christian life. As Paul wrote to the Romans: “Reckon ye also yourselves to be dead indeed unto sin, but alive unto God through Jesus Christ our Lord” (Romans 6:11).
2:20 liveth in me. Christ lives in us by His Spirit (John 14:16-17,23). Since He is continually present in and with the believer, He knows all we say and do, hears our prayers and will guide our steps as we follow His will.
2:20 faith of the Son of God. This is not the faith which we exercise in Christ, but His faith, which He lives out through us as we appropriate His life in us (compare Ephesians 2:9).