From the introduction to two sermons in The Works of Jonathan Edwards, Volume 2. The attribution is given to T. Prince and W. Cooper, written in 1731.

…it is the very soul of piety, to apprehend and own that all our springs are in him; the springs of our present grace and comfort, and of our future glory and blessedness; and that they all entirely flow through Christ, by the efficacious influence of the Holy Spirit. By these things saints live, and in all these things is the life of our spirits.

Such doctrines as these, which, by humbling the minds of men, prepare them for the exaltations of God, he has signally owned and prospered in the reformed world, and in our land especially, in the days of our forefathers; and we hope they will never grow unfashionable among us: for, we are well assured, if those which we call the doctrines of grace ever come to be contemned or disrelished, vital piety will proportionably languish and wear away; as these doctrines always sink in the esteem of men upon the decay of serious religion.

I believe they are right.