Why is God's mercy significant in salvation?

Ephesians 2:4 states, "But God, who is rich in mercy, because of His great love with which He loved us..." This passage points to the foundational role of God's mercy in salvation. Mercy is not receiving the punishment we rightfully deserve, and God's mercy is demonstrated in His decision to save and nurture a rebellious humanity. This does not mean that everyone is saved, but it highlights the select nature of His mercy towards the elect. It is through God's rich mercy that we realize our hopeless state and the unearned grace that He provides. This understanding compels believers to worship and glorify God for the depth of His love and mercy, which led Him to sacrifice His Son for those He chose to save.