Charles Haddon Spurgeon said this quote

“ My friends, I do not believe it is preaching Christ and him crucified, to give people a batch of philosophy every Sunday morning and evening, and neglect the truths of this Holy Book. I do not believe it is preaching Christ and him crucified, to leave out the main cardinal doctrines of the Word of God, and preach a religion which is all a mist and a haze, without any definite truths whatever. I take it that man does not preach Christ and him crucified, who can get through a sermon without mentioning Christ's name once; nor does that man preach Christ and him crucified, who leaves out the Holy Spirit's work, who never says a word about the Holy Ghost, so that indeed the hearers might say, We do not so much as know whether there be a Holy Ghost. And I have my own private opinion, that there is no such thing as preaching Christ and him crucified, unless you preach what now-a-days is called Calvinism. I have my own ideas, and those I always state boldly. It is a nickname to call it Calvinism. Calvinism is the gospel, and nothing else. I do not believe we can preach the gospel, if we do not preach justification by faith without works; not unless we preach the sovereignty of God in his dispensation of grace; nor unless we exalt the electing, unchangeable, eternal, immutable, conquering love of Jehovah; nor, I think, can we preach the gospel, unless we base it upon the peculiar redemption which Christ made for his elect and chosen people; nor can I comprehend a gospel which lets saints fall away after they are called, and suffers the children of God to be burned in the fires of damnation, after having believed. Such a gospel I abhor. The gospel of the Bible is not such a gospel as that. We preach Christ and him crucified in a different fashion, and to all gainsayers we reply, We have not so learned Christ. ”