What does it mean that salvation is all of grace?

Salvation being all of grace signifies that every part of our redemption—election, justification, calling, and regeneration—is a gift from God, without any contribution from us. Romans 3:24 states we are justified freely by His grace. This highlights the truth that we are completely dependent on God's grace for salvation, as we have no merit to present. As such, salvation is solely the work of God's hands, revealing His love and mercy towards unworthy sinners. Thus, every believer can rest assured that their secure state in Christ is according to His unchanging purpose and grace.