Paul's letter to the Colossians weaves together high theology with holy living, and exhortations with warnings. Its main theme is the fullness of Christ, and the fullness that Christians have in him. Christ's person and work are complete, and Christians have benefited from this completeness. Any attempt to supplement or replace the person and work of Christ therefore undermines and devalues him, and compromises the Christian faith. This commentary confronts several controversial doctrines, including the incomprehensibility of God and the origin of sin and evil. Other features include a summary of systematic theology from the perspective of christology, discussions on true versus false philosophy, true versus false spirituality, what it means to see the Father by "looking at" Jesus, the priorities of Paul in life and prayer, and the true nature of the Great Commission.