A man and a woman stood hand in hand on the beach. For a time, the only sound was the crashing of waves. Then the man asked, "What are you scared about?" She answered: "I want to marry you more than anything on earth. But I keep thinking that you'll change your mind and leave me just like. . . ." Her eyes fell to the ground. "Just like your dad left your mom?" he asked gently. Hesitantly, she nodded.
"Don't you trust me?" he asked.
"Oh yes," she said. "You are the most trustworthy man I have ever met." She paused, then said, "But I'm afraid that you'll realize that I'm not what you really want."
His hand grasped hers more firmly as he said: "I've known you since we were little kids. I know your faults. But I love you. I chose you, and there's no one else I want."
"I do trust you," she told him, "I just need to learn to trust you more."
Christians may find themselves in a similar position with their Lord. As believers, we trust God and know He is trustworthy. But doubt, guilt, and fear can eat away at our assurance that we are His and always will be. We can sometimes fear that we might be forsaken.
Assurance of salvation is both profoundly personal and deeply doctrinal. It was at the heart of the Reformation debate. The Roman Catholic Church said a Christian cannot have assurance without first having an extraordinary direct revelation from God. Reformers such as John Calvin said that assurance is the birthright of every believer, though it can be experienced in varying degrees.
We must first understand the relationship between faith and assurance. Assurance arises from the essence of faith, just as apples naturally grow on apple trees. Assurance is the cream of faith. The essence of faith is trust. Faith grasps the covenant God and finds Him sufficient. As Psalm 18:2a says, "The LORD is my rock, and my fortress, and my deliverer; my God, my strength, in whom I will trust" (KJV here and throughout).
Therefore, believers may rightfully have assurance of their salvation. David confesses, "The LORD is my shepherd" (Ps. 23:1). Paul declares, "I know whom I have believed, and am persuaded that he is able to keep that which I have committed unto him against that day" (2 Tim. 1:12).
The essence of assurance is knowing that I am saved—that my sins are forgiven and I belong to God—and therefore I know and experience communion with the triune God. In Ephesians 3:11–12, Paul writes of God's eternal purpose "in Christ Jesus our Lord: in whom we have boldness and access with confidence by the faith of him." He describes this access in Trinitarian terms: "For through him [Christ] we both have access by one Spirit unto the Father" (Eph. 2:18).
Each person in the Trinity is involved in the assurance of faith. Father, Son, and Holy Spirit lead us to approach God boldly as our merciful and glorious "Abba, Father" (Rom.