Believing in Christ and living out one’s life FOR Christ are two aspects of the life that is being sanctified. I think it comes back to the wisdom in James. What kind of faith do I have if there is little or nothing that shows that faith? And if I am a true believer and baptized, and show nothing of that belief, do I REALLY believe?
I am so thankful that God can see the insides of people. There are people who look squeaky clean on the outside but inside are deader than dead. And, Jesus talked about just such a thing to the religious leaders of his time.
In the meantime, I have met many people who will tell you they are a Christian but it is more of a cultural thing and they know little of the man whose name they walk under.
loving others, being Christ-like and being a forgiving person are all tied together, IMO