“There is no inconsistency or incoherence in the teaching of the New Testament about, on the one hand, the offer of Christ in the gospel, which Christians are told to make known everywhere, and, on the other hand, the fact that Christ achieved a totally efficacious redemption for God’s elect on the cross.
It is a certain truth that all who come to Christ in faith will find mercy (John 6:35, 47–51, 54–57; Rom. 1:16; 10:8–13). The elect hear Christ’s offer, and through hearing it are effectually called by the Holy Spirit. Both the invitation and the effectual calling flow from Christ’s sin-bearing death. Those who reject the offer of Christ do so of their own free will (i.e., because they choose to, Mat 22:1–7; John 3:18), so that their final perishing is their own fault. Those who receive Christ learn to thank him for the cross as the centrepiece of God’s plan of sovereign saving grace.”
J. I. Packer, Concise Theology, (Wheaton, IL: Tyndale House, 1993), 138-39
(HT: Of First Importance)