We can say that true gratitude does not give rise to the debtor's ethic because it gives rise to faith in future grace. With true gratitude there is such a delight in the worth of God's past grace, that we are driven on to experience more and more of it in the future...it is done by transforming gratitude into faith as it turns from contemplating the pleasures of past grace and starts contemplating the promises of the future.
John PiperThe main reason God has given us minds is that we might seek out and find all the reasons that exist for treasuring him in all things and above all things.
John PiperA woman who fears the Lord will not run away from God to satisfy her longings and relieve her anxieties. She will wait for the Lord. She will hope in God. She will stay close to the heart of God and trust in his promises. The prospect of departing into the way of sin will be too fearful to pursue; and the benefits of abiding in the shadow of the Almighty too glorious to forsake.
John Piper