How do we know that God's blessings are unmerited?

The concept of unmerited blessings is clear in the example of Obed-Edom, who witnessed God's blessing simply by having the Ark of the Covenant in his home. Obed-Edom's blessings came not from his own righteousness but through the consequences of David's sin, illustrating that God's grace is bestowed upon those who do not earn it. This affirms the Reformed understanding of God's sovereignty in salvation, where blessings flow from His mercy based on Christ's atoning sacrifice, not on our merit. Ephesians 2:4-5 explicitly states that we are saved by grace, emphasizing that our salvation and blessings are rooted in God's loving kindness regardless of our deeds.