Unbelievers do not need to be told there is something wrong with them. Christians are not lawyers who have to try and convince unbelievers that they are dirty or dead. They are already fully aware of their problem. You do not have to use the Ten Commandments to quiz them until they feel that lump in the back of their throat. Scripture says that God has already done that, that the Holy Spirit would convict the whole world—all people everywhere—because of unbelief in Jesus (John 16:8-11) and that the righteous requirements of the Law are written on their hearts and minds (Romans 2:14-15). This is why they are constantly attempting to approve themselves or defend themselves. They are already well-aware of their predicament without having to be convinced of it. Every society on the planet did not just up and decide it was wrong to murder innocent people or that it was wrong to take other people's stuff. This is innate. The Christian's duty is to give them the Gospel (Good News): "Jesus is awesome! He did something for you, and I want you to know about it!" That is it! That is the message on our lips! The Gospel is called Good News for a reason; by very definition there is no bad news in the Good News. Keep it simple and keep it about Jesus!
