How do we know grace is necessary for salvation?

The necessity of grace for salvation is rooted in our fallen state as described in Scripture. As Romans 3:23 states, all have sinned and fall short of the glory of God, and without grace, we remain helpless in our sin. Ephesians 2:8-9 further clarifies that we are saved by grace through faith, and this is not of ourselves; it is the gift of God, not resulting from works, so that no one may boast. This underscores the belief that salvation is entirely a work of God, initiated by His grace alone, as any attempt of self-effort would be insufficient. Grace is essential because it highlights God's love and mercy, making it possible for us to receive salvation without earning it, establishing a relationship built on His terms, not ours.