Why is the gospel command critical for Christians?

The command to teach the gospel is vital because it points to the central truth that sinners are not made holy by their actions but by being placed in Christ. This command indicates that no man can come to Christ except those whom the Father draws, highlighting God's sovereign grace in salvation. Additionally, the gospel is not merely an invitation but a gracious command that leads us away from our futile attempts to establish our own righteousness and towards reliance on Christ, who is our righteousness. This underscores the depth of God's love and mercy, which should compel Christians to teach and spread the gospel faithfully.