How does apostasy relate to mixing works with grace?

Apostasy is the ultimate danger of mixing works with grace, as discussed in Galatians. When believers who initially embrace the gospel of grace begin to rely on their works or adherence to the law, they risk falling away from the truth of the gospel. Paul indicates that any addition of works to salvation through grace constitutes a rejection of the grace of God, which can lead to a hardened heart and spiritual blindness (Hebrews 6:4-6). The act of turning back to legalism insidiously distorts the believer's view of Christ's sufficiency, leading to a spiritual descent where they may ultimately reject the essential tenets of their faith.