I will come into your house with burnt-offerings; I will pay you my vows, those that my lips uttered and my mouth promised when I was in trouble. I will offer to you burnt-offerings of fatlings, with the smoke of the sacrifice of rams; I will make an offering of bulls and goats. Come and hear, all you who fear God, and I will tell what he has done for me. I cried aloud to him, and he was extolled with my tongue. If I had cherished iniquity in my heart, the Lord would not have listened. But truly God has listened; he has given heed to the words of my prayer. Blessed be God, because he has not rejected my prayer or removed his steadfast love from me. (Psalm 66: 13-20)

The psalmist was in trouble. He offered God a deal. Save me and and I will fulfill a vow. We don't know what the psalmist promised.

The psalmist has come through the trouble. He is thankful. He has concluded that God was persuaded, motivated, extolled by what he said. The psalmist has also concluded that he is not wicked (or God would not have listened). There is just a whiff of having deserved God's special care.

God listened. God loved. Because the psalmist asked, God responded. I am skeptical of the psalmist's other conclusions.

I hate, I reject your festivals, nor do I delight in your solemn assemblies. Even though you offer up to Me burnt offerings and your grain offerings I will not accept them; and I will not even look at the peace offerings of your fatlings. Take away from Me the noise of your songs; I will not even listen to the sound your harps. But let justice roll down like waters and righteousness like an everflowing stream. (Amos 5: 21-24)

Above is Burnt Offerings by J.V. Harvey.