If you try to witness to people with the happiness gospel – that is, you tell them if they want a wonderful life, then they need to come to Jesus – what do you tell a rich, young, healthy man who is married to a beautiful wife and they have healthy, well-behaved children? To him, his life is already wonderful. What do you tell him? Do you tell him that one day he will be old and then he will need Jesus? Do you tell him that one day his wife may divorce him and take all his money and his children and then he will need Jesus? Do you tell him that one day he may be stricken with a terrible disease and then he will need Jesus?
None of those things make sense and none will impress upon the man the urgency of salvation – that today is the day of salvation – not some day in the future when his life isn’t so good. The one thing that will make him aware of the urgency is if he sees that he has violated God’s law – the Ten Commandments – and he is guilty before God awaiting an everlasting punishment in the lake of fire. Take him through the Ten Commandments and show him that he has broken God’s law. Then once he trembles at the thought of his condemnation, he will gladly receive the good news that the fine has been paid for him.