To say it a little differently, worship is declaring, with our lips and lives, that God is more important than anything else to us, that he is our deepest desire, that his inherent worth is beyond everything else we hold dear.
— Strobel, Kyle (2013-03-07). Formed for the Glory of God: Learning from the Spiritual Practices of Jonathan Edwards (p. 11). InterVarsity Press. Kindle Edition.
The debtor’s ethic says, “Because you have done something good for me, I feel indebted to do something good for you.” This impulse is not what gratitude was designed to produce. God meant gratitude to be a spontaneous expression of pleasure in the gift and the good will of another. He did not mean it to be an impulse to return favors. If gratitude is twisted into a sense of the debt, it gives birth to the debtor’s ethic - and the effect is to nullify grace.