CH Spurgeon: If we pant to see the Word of God increase, multitudes added to the disciples, and a great company of those who are least likely to be saved brought in, there must be an adequate instrumentality. Nothing can avail without the operation of the Holy Spirit and the smile from heaven. Paul planteth, Apollos watereth, and God giveth the increase. We must never begin our catalogue of outward means without referring to that blessed and mysterious potentate who abides in the church, and without whom nothing is good, nothing efficient, nothing successful.
Come, Holy Spirit, heavenly dove, with all thy quickening powers. O Spirit of the living God, if it were not for thy power we could not make the attempt, but when we rely upon thee we go forward in confidence.
As for the ostensible means, would any church prosper, there must be much plain preaching of the gospel of Jesus Christ. I have been struck lately in looking through the history of the Reformation, and of the times before the Reformation, with the remarkable downrightness of the testimony of the early preachers. If you look at the life of Farren you find him not preaching about the gospel, but preaching the gospel.
So it was with John Calvin... it was the same with Luther. Luther's preaching was just the ringing of a big bell, the note of which was always, "Believe on the Lord Jesus Christ and live! It is not of works, lest any man should boast, but by faith are ye saved, and by faith alone." They spake this, and they spake it again; neither did they couch the doctrine in difficult words, but they laboured with all their might, so to speak, that the ploughman at the plough-tail should understand, and that the fish-wife should comprehend the truth...
We must keep to this. This must be the hammer that we bring down upon the anvil of the human heart again, and again, and again. God forbid that we should glory save in the cross of Jesus Christ our Lord! God forbid that we should know anything among men save Jesus Christ and him crucified! Look to him—not to the priest, not to your good works, not to your prayers, not to your church-goings or your chapel-goings, but to Christ Jesus exalted. Look to him in faith, and God is willing to forgive you, able to forgive you, to receive you, to make you his children, and for ever to glorify you with himself.