It seems, brother Larry, that we are saying the same things about standing and state ---secure in our standing as born-again, sealed, and forever a child of God. Yes, our "state determines our rewards" in heaven, as to obedience and faithfulness.
We do suffer with Christ, I believe, by the fact that we belong to Him and live for Him in this ungodly world ---though not suffering as He suffered as "smitten of God" (Isa. 53:4). There is a suffering that speaks of devotion in the face of opposition, and that speaks of our spiritual state, as you said.
You spoke of one coming among us who is not saved. We would welcome them, try to be helpful, and have them sit back (1 Cor.14:16), and observe, rather than participate in the ministry and be at the Lord's table. We would try to keep in contact, encourage them, and help them to see the need to receive the Lord Jesus into their heart, etc. ---"God peradventure will give them repentance to the acknowledging of the truth" (2 Tim.1:25).
Letters of commendation were given in the N.T. church for one who travels, to be known to another assembly as in happy fellowship. There was no such thing in the early church as independent assemblies; they were always mindful of the "one body of Christ" and sought to express that in unity and a bond of love everywhere. Denominated sects were not known then.
I don't know where you live, but we might even know of an assembly in this fellowship there. We highly value keeping the truth of "one body" (as it will be in heaven), and expressing the "unity", "one accord", and avoiding "schism", as God has said.