Why is it crucial for Christians to live by faith?

For Christians, living by faith is essential as it reflects a dependence on the finished work of Jesus Christ for all aspects of life, including righteousness and acceptance before God. Paul states in Galatians 2:20 that he lives by the faith of the Son of God, emphasizing that it is not his own strength or works that contribute to his ability to live a godly life but Christ’s power working within him. This faith speaks to the believer’s identity and ongoing relationship with Christ, as it is through faith that we are sanctified and empowered to uphold God's standards. Without this framework of faith, Christians risk falling back into legalism and self-effort, which diminishes the joy and freedom found in Christ.