Because Christ was BORN in the flesh as a means for God (the father) to show he (God the son) undestands (sort of) what MORTAL life is like and living perfectly (we Are not) IS possible. Satan was NOT an NEVER WILL BE born IN THE FLESH. Second arrival BOTH are supernatural DESENTS from the heavens. ONE (satan) we will be ALIVE. the other (Christ) FIRST thing he DOES is kill us ALL (transformed in the twinkle of an eye into our SPIRIT bodies (what happens when you DIE)). I suppose you wondering how do I know the Bible isn't absolutely and entirely lies? I DO NOT. BUT, the principles of goodness and truth described therein, ring SOLID with me, so I have FAITH. WHY trick me while offering NO opposing (PLAUSABLE) perspective in the FIRST place? Garbage in, garbage out.