If we have no zeal for the glory of God our mercy must be superficial, man-centred human improvement with no eternal significance. And if our zeal for the glory of God is not a revelling in his mercy, than our so-called zeal, in spite of all its protests, is our of touch with God and hypocritical.
John PiperThis is the centre of the gospel - this is what the Garden of Gethsemane and Good Friday are all about - that God has done astonishing and costly things to draw us near.
John PiperThe gospel is the good news that the everlasting and ever-increasing joy of the never-boring, ever-satisfying Christ is ours freely and eternally by faith in the sin-forgiving death and hope-giving resurrection of Jesus Christ.
John PiperWe 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 Piper