"'I believe men can be saved if they will.' My dear sir, that is not the question at all. The question is, are men ever found naturally willing to submit to the humbling terms of the gospel of Christ? We declare, upon Scriptural authority, that the human will is so desperately set on mischief, so depraved, and so inclined to everything that is evil, and so disinclined to everything that is good, that without the powerful, supernatural, irresistible influence of the Holy Spirit, no human will ever be constrained towards Christ."
Charles Spurgeon on human inability (March 7, 1858)