How do we know that salvation is entirely of grace?

Ephesians 2:8-9 clearly articulates that by grace we are saved through faith, and that not of ourselves, it is the gift of God, not of works, lest any man should boast. This emphasizes that salvation is a sovereign act of God rather than a result of our own efforts. God orchestrates every aspect of our salvation, from the opening of our hearts to our faith in His word. The entirety of Scripture supports the truth that our relationship with God relies solely on His initiative and grace, assuring believers that our standing before Him is secure in Christ's finished work.