What if a church member came up to you and shared that they were doubting their salvation or were wanting to be assured that they were saved? Other than scripture, one tool that I would use would be to walk through what the 2nd London Baptist Confession has to say about assurance. Using this tool, I would begin and end by pointing to the gospel as the only message that has the power to save and give assurance.
Following along the format of the 2nd London Baptist Confession which you can read in full here , I would first let this person know that assurance is a real and true thing. We can have assurance of our salvation and that it is a good thing to have. Article 1 on the chapter of assurance in the Confession states: “. . .yet such as truly believe in the Lord Jesus, and love him in sincerity, endeavouring to walk in all good conscience before him, may in this life be certainly assured that they are in the state of grace, and may rejoice in the hope of the glory of God, which hope shall never make them ashamed.”
Knowing this, I would then try to probe with questions to see if the person is able to articulate the gospel. Jesus is the one that saves and therefore we must place our complete trust in what He did on the cross, in his resurrection, and what He does in us. The gospel is the foundation of assurance. There can be no assurance where the person has not experienced the life changing power of the gospel.
Secondly, I would point out that there are basically three ways that God gives us assurance. The primary way is by staying focused on the object of our faith. This once again comes back to the Gospel. We do not save ourselves; salvation is the work of God. This means that we can be assured because God has promised salvation to those who have repented and put their trust in Jesus. The second means of assurance is the work of the Holy Spirit in our lives. The Bible says that “the Holy Spirit himself bears witness with our spirit that we are the Children of God.(Romans 8:16)” The Holy Spirit does this by convicting us of sin and moving us to good works. We also have the internal witness that our faith is truly in Christ. The third means is related to the second in that the Spirit moves us to bear fruit(Galatians 5:22-23). We should examine our lives and be able to see where we have been changed by Christ. Do we desire righteousness more than sin? Are we growing in maturity and in the love of Christ for the things that Christ loves? Our works do not save us but they are the result of salvation. If we do not see these fruits than that may be cause for concern.
Thirdly, I would point out that we may at times lose not our salvation but our assurance. Grievous sin in our life can cause the Spirit of assurance to leave us. Christians will not remain in sin but we can fall into it at times. Sin can cause our hearts to lose the assurance we once had. We should repent and turn from this sin(Psalm 51:12). Sometimes, however, God may withhold assurance to cause us to seek after Him. He does not do this out of spite but out of love so as to motivate us to thirst for Him. God however will never leave us completely alone. And with much diligence and searching, God rewards us with the object of our search, Himself.
Assurance then should be sought after and cherished. Jesus must be the focus of our faith. He is the one we trust in, not a prayer that we have prayed or a walk down an aisle. We can only have assurance of salvation if we have truly repented and placed our faith in Jesus. Then we can be assured:
Blessed assurance, Jesus is mine!
Oh, what a foretaste of glory divine!
Heir of salvation, purchase of God,
Born of His Spirit, washed in His blood.
Perfect submission, perfect delight,
Visions of rapture now burst on my sight;
Angels, descending, bring from above
Echoes of mercy, whispers of love.
Perfect submission, all is at rest,
I in my Savior am happy and blest,
Watching and waiting, looking above,
Filled with His goodness, lost in His love.
This is my story, this is my song,
Praising my Savior all the day long;
This is my story, this is my song,
Praising my Savior all the day long.