A friend of mine didn't wish to believe in Christ. His good friend was losing the battle with cancer, so I took the chance to reason with him like this. We are all sinners and if there is God, he has to be holy. As sinners, we cannot enter heaven where the holy dwell. He agreed with me so far. Many people like to clear their conscience before they die, but telling another human being about their sins is useless because the sins remain. To get our sins forgiven, we need to confess and repent to God and then we shall be saved. Therefore, we need to believe in Christ. It seemed that I made some sense to him.