I am both a Cultural Christian and the real deal. That is to say I do outwardly Christian things like go to church. I also know a lot of Christian phrases useful in conversations with other Christians. For example, I understand what people mean when they use the word "fellowship" as a verb. But I also take Jesus seriously and I sincerely try to live obedient to his instructions. I also know enough about myself to understand I need large slatherings of God’s grace daily.
Whether I am behaving as the Cultural Christian or I am living out of a deep authentic still point filling me with God's love, the difference will likely be indiscernible by me directly. Rather, I may find that I will learn to live more authentically by working to be a good friend. Struggling to be kind in challenging relationships is a great feedback loop to help me work on my own motives and behaviors.
“The beginning of love is to let those we love be perfectly themselves, and not to twist them to fit our own image. Otherwise we love only the reflection of ourselves we find in them.”