What does 'grace alone' mean in the context of salvation?

'Grace alone' encompasses the core of the Reformed understanding of salvation, emphasizing that it is solely through God's grace that we are saved. This principle teaches that from election to redemption, every aspect of our salvation is the result of God's unmerited favor. The Apostle Paul frequently stresses this in his letters, declaring in Ephesians 2:8-9 that we are saved by grace through faith, and that this is a gift from God. This underscores the belief that our salvation is not contingent upon our works or righteousness but is rooted entirely in Christ's atonement and God's gracious choice of His elect, highlighting the depth of God’s mercy toward sinners.