But it is in the post-1871 period that he speaks more frequently and with greater urgency on the subject of socialism. In a sermon on Psalm 118 in June 1878, Spurgeon made a tentative prediction to his congregation:
German rationalism which has ripened into Socialism may yet pollute the mass of mankind and lead them to overturn the foundations of society. Then “advanced principles” will hold carnival and free thought [i.e., atheism] will riot with the vice and blood which were years ago the insignia of “the age of reason.” I say not that it will be so, but I should not wonder if it came to pass, for deadly principles are abroad and certain ministers are spreading them.
In a sermon on Isaiah 66 in April 1889, Spurgeon, recognizing that many had confused the Gospel of Jesus Christ with the cheap, secular knock-off proclaimed by Marx and his ilk, thundered from his pulpit:
For many a year, by the grand old truths of the gospel, sinners were converted, and saints were edified, and the world was made to know that there is a God in Israel. But these are too antiquated for the present cultured race of superior beings! They are going to regenerate the world by Democratic Socialism, and set up a kingdom for Christ without the new birth or the pardon of sin. Truly the Lord has not taken away the seven thousand that have not bowed the knee to Baal …
The latter-day gospel is not the gospel by which we were saved. To me it seems a tangle of ever-changing dreams. It is, by the confession of its inventors, the outcome of the period—the monstrous birth of a boasted “progress”—the scum from the cauldron of conceit. It has not been given by the infallible revelation of God—it does not pretend to have been. It is not divine—it has no inspired Scripture at its back. It is, when it touches the Cross, an enemy! When it speaks of Him who died thereon, it is a deceitful friend. Many are its sneers at the truth of substitution—it is irate at the mention of the precious blood. Many a pulpit, where Christ was once lifted high in all the glory of His atoning death, is now profaned by those who laugh at justification by faith. In fact, men are not now to be saved by faith but by doubt. Those who love the Church of God feel heavy at heart because the teachers of the people cause them to err. Even from a national point of view, men of foresight see cause for grave concern.