You have just had the privilege of leading a new convert to Christ. He is overwhelmed at the knowledge that Christ has forgiven his sins and saved him from hell. All is well for many weeks as this new babe in Christ enjoys his new life, but one night you receive a phone call from the same person sounding quite distraught and dejected.
It seems he has slipped into his former lifestyle and committed a terrible sin. He is sure that God cannot forgive him, and that his salvation is no longer guaranteed.
How would you counsel him? What would you say concerning his lack of assurance over his salvation? How would you help him deal with the sin he is convicted over?