Well, it depends. Really. Sometimes you just cannot know that you are a victim of possession, sometimes you do. Sometimes people voluntarily submits to the devil. In most cases, according to my knowledge, people just don't know.
Everyone can be possessed. As far as I know.
According to the...
It's not so simple as that - differences can look like subtle, but in fact they are really massive - like original/ancestral sin, nature of Christ's sacrifice, role of Mary, organization of the Church etc.
Well, Oriental Orthodoxy do not recognize the first seven ecumenical councils as faithfull - they keep the resolutions of the first three, first of Nicaea (325), first of Constantinople (381) and first of Ephesus (431). Greatest issue is the matter of Christ's nature - while "classic" Eastern...
Hello, here I chose the nickname Talos to be known as... well, Talos ;) . In the matter of religion, for now I'm pretty orthodox (but not Eastern Orthodox per se, not yet) Christian, who returned to the Church from a not-very-long journey through deism and some form of atheism. Originally I'm...