“What Reformed theology teaches is that it is true the believer makes the right response and the non-believer makes the wrong response. But the reason the believer makes the good response is because God in His sovereign election changes the disposition of the heart of the elect to effect a good response. I can take no credit for the response that I made for Christ. God not only initiated my salvation, He not only sowed the seed, but He made sure that that seed germinated in my heart by regenerating me by the power of the Holy Ghost. That regeneration is a necessary condition for the seed to take root and to flourish. That’s why at the heart of Reformed theology the axiom resounds, namely, that regeneration precedes faith. It’s that formula, that order of salvation that all semi-Pelagians reject. They hold to the idea that in their fallen condition of spiritual death, they exercise faith, and then are born again. In their view, they respond to the gospel before the Spirit has changed the disposition of their soul to bring them to faith. When that happens, the glory of God is shared. No semi-Pelagian can ever say with authenticity: “To God alone be the glory.” For the semi-Pelagian, God may be gracious, but in addition to God’s grace, my work of response is absolutely essential. Here grace is not effectual, and such grace, in the final analysis, is not really saving grace. In fact, salvation is of the Lord from beginning to end. Yes, I must believe. Yes, I must respond. Yes, I must receive Christ. But for me to say “yes” to any of those things, my heart must first be changed by the sovereign, effectual power of God the Holy Spirit.”

– R.C. Sproul