The elect of God by nature are in a state of utter inability and rebellion towards God. Their salvation has been ordained by God the Father from before the foundations of the world. Their salvation has been secured and purchased by God the Son on Calvary's cross. Consider II Tim. Because all men share the same contempt for God and His Son, no man, on his own, will come to Christ.
Many people believe that to some extent.
They believe that apart from the convicting power of the Holy Spirit, no one will come to Christ. This is plainly speaking of something which effectually brings a sinner in faith to Christ. It simply means that the Spirit of God overcomes and conquers the resistance met in the heart of the sinner. God supernaturally opens the sinner's blind eyes to see his great need of the Savior. Such a man is made willing, and freely chooses to come to Christ.