Ephesians 4:20-21 Learning Christ

Paul tells the church in Ephesians that they have not learned Christ according to how the Gentiles think and live. What does Paul mean by learning Christ, hearing Christ, and being taught by Him? Pastor Sean explains by going back to the gospels and teaching a variety of things Jesus spoke in His earthly ministry. Ultimately, Paul is calling the church to examine themselves, to work out their own salvation, in fear and trembling.