Why is it important that God is sovereign in mercy?

In Psalm 108, we see the reflection of God’s sovereignty in His mercy, especially when the psalmist acknowledges that salvation cannot come from man but only through God. When God declares, 'I will be gracious to whom I will be gracious,' it affirms that His grace is not based on our actions but is a manifestation of His divine will. Understanding this sovereignty is crucial for believers because it provides security and assurance that our salvation rests on His character and promises, which cannot change or fail.