Though we don't earn our salvation, we recieve it by faith through God's grace, our faith should move us. We know that we are his by his influence and work in our lives. If your relationship with Jesus is real it should make a difference in your life. We can play games with people in our lives. We can make some feel that we care when in fact we don't. We can spend time with a person and never once let them into our life. The same is true of folks with Jesus. They talk about him, but never really to him. They spend time in his house, but never truly invite him to make his home in them.
It doesn't really matter if you lie to the preacher or your family about who you are. It does matter what you tell Christ, you can't lie to him. So are you being real with Jesus in your life?