All you need. Nothing you don't.
How difficult it is to comprehend the reality of the one true church. Peter, the apostle, missed it even after having a special vision about it.
Some, having been burned in the traditional churches, write the whole thing off and reject everyone in it. I believe that may be a mistake. Btw, you can get severely burned in a house church, too. Sin does not differentiate.
Well, let’s say we’re at 40k feet and the pilot announces in a quivering voice that the jet engines have just malfunctioned. Could we not take the hand of another believer and pray for the safety of the plane and for those who haven’t yet made peace with God? Would the mode of baptism, church structure, the Sabbath, or one’s view of the great tribulation make much difference then? I doubt it.
The plane is planet earth. It’ll crash and burn but the new heavens and earth await those who follow the Lamb. Until then we might follow the admonition of Paul to be gentle with each other.
Jesus’ prayer in another “Lord’s Prayer”: John 17:11 And now I am no more in the world, but these are in the world, and I come to thee. Holy Father, keep through thine own name those whom thou hast given me, that they may be ONE, as we are.
John 17:21-22 That they all may be one; as thou, Father, art in me, and I in thee, that they also may be ONE in us: that the world may believe that thou hast sent me. And the glory which thou gavest me I have given them; that they may be ONE, even as we are ONE.