Do you believe in morality? Do you believe there is right and there is wrong in this world? Do you believe that people should not kill, not steal, not rape, not be forced to be a slave to another, not sleep around when they are married, not just walk up to another human being and punch them in the face? Do you believe that any of the previous statements is true?
Why do you believe that?
Some people say that it is arrogant for a Christian to say that things are right and wrong. They say Christians are closed minded and intolerant because of what the Bible teaches regarding how Christians are to live. Jesus said "I am the Way, the Truth and the Life. No one comes to the Father except through me." (John 14:6) That's crazy people say. There is no absolute truth. What is true for Jesus, or for Christians, might be true for them but not for me! I decide what is true and what isn't.
The problem with that kind of thinking is taken to its logical end it is absurd. When someone breaks into your house, takes all your stuff and assaults your wife or little sister, the idea that each man defines for himself truth and morality flies right out the window. When you feel violated you appeal to some sense of justice. You appeal to a higher standard that has been compromised in your life by the behavior of another person.
Each man determining what is right and wrong is ridiculous and we know it at our core. There is a moral law of the universe that speaks to the conscious of man's heart. And that law comes from Jesus Christ, creator of heaven and earth. He made this place and he determines the rules. Like it or not. James 4 says, "There is only one lawgiver and judge, he who is able to save and to destroy."