Two of the most commonly taught — and most misleading — doctrines in modern Christianity are Lordship Salvation and Perseverance of the Saints (POTS). Both systems tell you to look at your works to know if you are truly saved. But Jesus never pointed Nicodemus to his behavior, fruit, or perseverance. He pointed him to the necessity of a new birth — something only God can do.
Let’s walk through why the born-again experience utterly destroys these false systems of assurance and gives the believer unshakable confidence in the finished work of Christ.
Jesus didn’t say, “Keep performing and you might make it.” He said:
"It is finished." — John 19:30
This wasn’t poetic language. It was a legal declaration: the debt for sin was paid in full. The book of Hebrews backs this up:
"We have been sanctified through the offering of the body of Jesus Christ once for all." — Hebrews 10:10
Salvation is a completed transaction. At the moment of faith, the believer is fully justified — declared righteous before God.
"To the one who does not work but believes in Him who justifies the ungodly, his faith is counted as righteousness." — Romans 4:5
This is not a process. It’s not based on performance or endurance. It’s a legal position granted instantly and permanently the moment one believes.
"He who hears My word and believes in Him who sent Me has everlasting life, and shall not come into judgment, but has passed from death into life." — John 5:24
Past tense. No probation. No endurance test. The believer has already passed from death to life.
Being born again isn’t just a poetic phrase. It’s a spiritual reality that changes your identity forever.
"That which is born of the flesh is flesh, and that which is born of the Spirit is spirit." — John 3:6
Nicodemus, a Pharisee who had built his entire life on righteous behavior, was told it wasn’t enough. Why? Because nothing from the flesh — not even the best works — can please God.
The solution?
You must be born again. — John 3:7
This spiritual rebirth is instantaneous and permanent. When we believe, God creates in us a new spirit:
"Whoever is born of God does not commit sin... because he has been born of God." — 1 John 3:9
This verse isn’t saying believers never sin in the flesh. It’s talking about the new creation — the spirit born of God — which is incorruptible and sinless. This is why Paul can say:
"You are complete in Him." — Colossians 2:10
"After you believed, you were sealed with the Holy Spirit of promise, who is the guarantee of our inheritance until the redemption of the purchased possession." — Ephesians 1:13-14
This means your eternal destiny is locked in. You don’t keep it by good behavior, nor lose it by sin. You’re sealed until the Day of Redemption — when you will receive a sinless glorified body to match the new spirit already within you.
Lordship Salvation says that unless Jesus is Lord of every area of your life, you might not be saved. It confuses discipleship with salvation, making assurance impossible.
POTS says you must persevere in holiness and good works to the end of your life to prove you were truly saved.
But both doctrines direct you away from Christ's finished work and toward your own behavior — a foundation of sand.
The new birth flips this on its head. It tells you that:
You’re a new creation (2 Corinthians 5:17). You’ve been born again of incorruptible seed (1 Peter 1:23). You’ve been sealed until redemption.
That’s not something you earn. That’s something you receive.
The reason you can rest in your salvation is not because you’re performing well, but because God has declared you righteous and has reborn your spirit.
So next time someone tells you to “examine your fruit” or “see if you’re really saved,” just point them to Jesus’ words:
"Whoever believes in Him shall not perish but have everlasting life." — John 3:16
Believe. Be born again. Be secure.