Why is it important for Christians to avoid adding works to faith?

Paul warns in Galatians 5:2-4 that if we add works to grace as a condition for salvation, we fall from grace and render Christ's sacrifice ineffective. This is vital for Christians because the moment we rely on anything alongside Christ, we dilute the purity of the gospel and place a yoke of bondage upon ourselves. The call to emphasize 'Christ alone' ensures that believers remain anchored in the truth that salvation is fully accomplished in Him, guarding against legalism and reinforcing personal assurance rooted in His finished work, not our performance.