If you are one of the flock of Christ, one of His lambs, then you can know with certainty that an atonement has been made for your sins. You may wonder how you can know you’re numbered among the elect. I cannot read your heart or the secrets of the Lambs Book of Life, but Jesus said: “‘My sheep hear My voice’” (John 10:27a). If you want Christ’s atonement to avail for you, and if you put your trust in that atonement and rely on it to reconcile you to almighty God, in a practical sense, you don’t need to worry about the abstract question of election. If you put your trust in Christ’s death for your redemption and you believe on the Lord Jesus Christ, then you can be sure that the atonement was made for you. That, more than anything else, will settle for you the mystery of God’s election. Unless you’re elect, you won’t believe on Christ; you won’t embrace the atonement or rest on his shed blood for your salvation. If you want it, you can have it. It is offered to you if you believe and trust.
One of the sweetest statements from the lips of Jesus in the New Testament is this: “‘Come, you blessed of My Father, inherit the kingdom prepared for you from the foundation of the world’” (Matt. 25:34b). There is a plan of God designed for your salvation. It is not an afterthought or an attempt to correct a mistake. Rather, from all eternity, God determined that He would redeem for Himself a people, and that which He determined to do was, in fact, accomplished in the work of Jesus Christ, His atonement on the cross. Your salvation has been accomplished by a Savior Who is not merely a potential Savior, but an actual Savior, One Who did for you what the Father determined He should do. He is your Surety, your Mediator, your Substitute, your Redeemer. He atoned for your sins on the cross.
—R. C. Sproul, The Truth of the Cross (Reformation Trust, 2007), 151–1