John 3:18
He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God.
What this passage establishes
Condemnation turns on whether a person believes in the name of God’s only begotten Son.
Why it matters in the argument
Grace is God’s saving source, Christ’s death and resurrection are the saving event, and living faith is the means of reception. Biblical obedience responds to grace; it does not purchase it.
Apostolic connection
The gospel pattern is Christ’s death, burial, and resurrection. Acts 2:38 gives the covenant response: repentance, burial with Christ in baptism, and new life by the Spirit.
Common misunderstanding
The Bible’s rejection of meritorious works does not turn commanded faith-response into unbelieving human merit. Scripture can oppose works of law while demanding obedience of faith.
How to use it in conversation
Clarify source, event, and response: saved by grace, through faith, because of Christ, in the obedient response God commands.