[Kolokotronis]

"My understanding is that it's part of the discipline of the RCs that we don't communicate with separated brethren."

As a general proposition that's correct. Do you know why?

As for Orthodoxy, generally USCB says you can commune with us; we don't allow it. Do either of you know why?

Orthodoxy does not allow us to receive communion in any non-Orthodox church or ecclesial group save under certain circumstances with the Oriental Orthodox.

[Mad Dawg]

I wouldn't say "know" about anything going on in my head about this question. My impression is that, at least as far as Communicating in non-Catholic services it's a matter of not having sacramental unity unless there's some other kind of organic structural unity as well.

I do observe that in churches like my old one, there's a kind of "open communion creep" that takes place. It used to be, if your church would allow Episcopalians and if YOU were allowed to receive in your church (and you were baptized and all that) then come on down. Now, in just my lifetime, anyone can receive, baptized or not.

So there may be some charismatic pastoral wisdom going on that I'm not aware of or that I don't understand.

Do YOU know why or have an opinion?