"And what is the heresy of Arminianism but the addition of something to the work of the Redeemer? Every heresy, if brought to the touchstone, will discover itself here. I have my own private opinion that there is no such thing as preaching Christ and Him crucified, unless we preach what nowadays is called Calvinism. It is a nickname to call it Calvinism; Calvinism is the gospel, and nothing else.... ...The old truth that Calvin preached, that Augustine preached, that Paul preached, is the truth that I must preach to-day, or else be false to my conscience and my God. I cannot shape the truth; I know of no such thing as paring off the rough edges of a doctrine. John Knox's gospel is my gospel. That which thundered through Scotland must thunder through England again." —C. H. Spurgeon Spurgeon bodly taught and defended Calvinism because he believed that God saves. There are a ton of theological systems out there, but (for discussion purposes) they can all be simplified to two propositions: 1. God saves. (Calvinism) 2. God would like to save. (Pelagianism, Arminianism, Open Theism, Romanism, etc.) I ask you to please think about this one for a minute. Free will theology teaches that God would like to save someone, but the person must do something (yield, believe, repent, pray a prayer, be sincere, etc.) before God can save them. If you ask God in prayer to save someone, and you have faith that God can effectually save that person through his own sovereign power, then you are a Calvinist.