For the unrepentant, fear and guilt lead them into hell. For the repentant, fear and guilt lead them into heaven.
Guilt doesn't save anyone. Neither does repentance. Jesus saves.
Salvation is the revelation and application of the work of Jesus to an individual. It is a demonstration of the grace of God wherein the hearing is given and the heart is circumcised that affects the will to respond in faith.
This is what happened to 3,000 souls the day of Pentecost. Countless thousands more did not have the same response despite hearing the same message and experiencing the outpouring of the Spirit and subsequent signs. What explains the different responses?