We talk a lot in church about 'non-christians'. I used to just accept this phrase, and used it a lot when describing my friends who didn't go to church, were members of other religions, believed different things etc. Its only recently that I've realised how horrifying I actually find this term. I don't think anyone would actually voluntarily describe themselves as a 'non-christian' (except maybe if this was a new development and they used to be a christian). People may describe themselves as muslims, jews, atheists, pagans, non-religious, socialists, anarachists, disinterested in religion/politics or any other number of things, but people very rarely describe themselves as something that they are not, at least in my experience.
I can no longer conceive of describing one of my friends, who has opinions about spirituality, life, politics and everything else under the sun as merely 'a non-christian'. I think it shows a disctinct lack of respect for all that people are and believe to describe them in this way. I would love for more of my friends who don't know Jesus (ha! thats such an evangelical thing to say) to become christians, because I think christianity has such a huge amount of truth and beauty, my life (and my eternity) would be so much less without it. But when I engage with people I care about around issues of faith and spirituality, I want to know what they believe as well as sharing with them what I believe. I want to know how they express their spirituality as well as talking about/showing how I do. When we describe people as 'non-christians' and describe them by their LACK of belief, then we do not leave the door open for this kind of interaction. This is a sad loss for all of us.