Now the hearts of saints in heaven are all, as it were, a pure flame of love. Love is the grace that never faileth. Whether there be prophecies, they shall fail, whether there be knowledge, it shall vanish away. Faith shall cease in vision, and hope in fruition, but love never faileth. The grace of love will be exalted to its greatest height and highest perfection in heaven. And love will vent itself in praise. Heaven will ring with praise because it is full of love to God. This is the reason that great assembly, that innumerable host, praises God with such ardency, that their praise is as the voice of many wathers, and as the mighty thunderings, because they are animated by so ardent, vigorous, and powerful a principle of divine love.
The mercy and grace of God for which thesaints in heaven will chiefly praise him is his mercy exercised in the work of redemption, which work has been wrought out in this world. This love of God is the chief object of their admiration, and what they chiefly contemplate, and that employs their most ardent praise.... They will chiefly praise God for these fruits of his mercy, because these are the greatest fruits of it that ever have been, far greater than the glorifying of saints. The saints in heaven will praise God for bestowing glory upon them. But the actual bestowment of glory upon them, after it has been purchased by the blood of Christ, is in no measure so great a thing as the purchasing of it by his blood. For Christ, the eternal Son of God, to become man, and to lay down his life, was a far greater thing than the glorifying of all the saints that ever have been, or ever will be glorified, from the beginning of the world to the end of it. The giving Christ to die, comprehends all other mercies. For all other mercies are through this. The giving of Christ is a greater thing than the giving of all things else for the sake of Christ. This evidently appears, from Rom. 8:32, "He who spared not his own Son, but delivered him up for us all, how shall he not with him also freely give us all things?" So that the work of redemption is that for which the saints in heaven do chiefly praise God.-Jonathan Edwards, Sermon "Praise, One of the Chief Employments of Heaven", 1734.