[quote="JonNC, post:2, topic:289696"]
Be positive. Speak positively about your faith and communion. Don't bash. For example, if you are discussing issues with Lutherans, the worst thing you can do is start out by bashing and trashing Luther. It simply puts folks into defensive mode, instead of being interested in open dialogue, and open to what you have to say.
This would be my number one request. Be truthful but positive about why you are Catholic or Orthodox, rather than focusing primarily on what you perceive to be the problems in what I believe and in my Christian community. I already know all Christian communions have problems and weak areas, as well as each having their own strengths.
In being positive, don't be unrealistic. You're not a salesman, you are a fellow pilgrim--don't bother trying to over-sell Catholicism or Orthodoxy like it's a "It slices, it dices, it answers all your theological questions" gadget. Again, I already know the Christian life for any kind of Christian can be hard going at times. Life on this planet can be painful and confusing regardless of whatever faith one holds.
If I doubt or question some belief you hold, please don't play armchair internet psychologist by assuming I must have some subconscious reason for not believing as you do. Maybe the evidence just doesn't seem that conclusive to me. Please assume, if assume you must, that I'm trying to be honest with God, myself, and you, and questioning---and looking for evidence--- in good faith.
Please do not endeavor to undermine anyone's faith, even if you don't approve of what they believe. Don't assume that if you undermine a person's form of Christianity, for example, that if that ground becomes shaky for them because you've mercilessly pointed out every last weak spot in their beliefs, that they will jump onto your patch of ground with relief. Maybe your patch of ground seems just as questionable as theirs, with simply a different set of weak areas and questionable beliefs. If you succeed too well in your undermining efforts, there's a possibility they may abandon Christianity altogether.
Not a one of us will fully know if we've made the best choices in our beliefs about God until we stand before Him on Judgment Day. Till then, humility is needed with those who believe differently than we do.