I'm going to get massacred for this

, but here I go...
Jesus is God, so is the Father and the Holy Spirit, but they are all seperate. I know this is confusing, but our tiny minds can't understand it. Jesus even says that the Father and him are one, and the Father says at Christ's baptism "This is my Son, whom I love, with him I am well pleased." Yes you are saying to yourself "That doesn't even deal with Christ being God," but it does(in a way). The Holy Spirit concived Jesus, Mary just was a host you could say, and that is how Christ became a human. Mary is not holy; she inherited the sin from her parents, but the Holy Spirit concived Jesus so he would not recieve sin. Aw, my head hurts.
Christ lived the life of a human, but without sin. He took our place for death, and assured us that we would rise again when HE(not the Holy Spirit) had risen again. Christ concured death, sin, and the devil.
With original sin; we inherited sin from our parents when we were created, and that's even when we were a one celled organism.
And what is Tertullian? Is it a book from the Catholic Bible? I would't know because I'm a Lutheran. Could I have some more info on this Ter-tu-lli-an thing. PM me with the info, thanks.
Please don't kill me for saying this.
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I'm a bit behind in the discussion, sorry.