There are two types of christians, the carnal, fleshly, outward, and the spiritual or inward. The flesh and the spirit war against each other. Who is a Jew but one inwardly indicates the outward or flesh does not apply without an inward reality. Same is true with Christians. So the appearance of Christianity does not assure the reality of a spiritual relationship with Christ.The true spiritual Church can include people from many denominations, but denominations exclude by definition. All I can conclude is if you abide in His words and His words abide in you, you will live with Him. If they do not, then you are trying to be spiritual with a carnal mindset and this will bring division. The spiritual is anti-carnal and the carnal is anti-spiritual. oh yes, also the carnal is anti-carnal because it is a house divided. The Spiritual church being in union with Christ is not divided but everyone is in agreement with Him.