How to respond:
Start by admitting that you mess up. You sin and don't get it right all the time. Every Christian sometimes fail to live up to the standard Jesus set. Then explain that being a Christian doesn't mean that you are perfect - or better - than any other person. Being a Christian means that you trust that Jesus is the only way to heaven. Being a Christian means relying on the Holy Spirit to begin making you a person that lives up to Jesus' standard.