Why do we say mercy is not getting what we deserve?

The definition of mercy as 'not getting what we deserve' serves to illustrate its nature as a loving act of God towards sinners. Romans 9:15 says He will show mercy according to His sovereign will, meaning His decisions on who receives mercy do not depend on our actions or stature. This concept is essential as it contrasts with the belief that humanity can earn salvation; it asserts that all salvation originates from God's decision to withhold the judgment we deserve because Christ has already borne that penalty in our place. Thus, mercy is entirely a gift of God and highlights both His justice and grace.