That's very interesting about Mithraism. If it's true that Mithraism had all of those traditions for a couple of thousand years before the birth of Jesus, one can imagine the possibility that during the years of Jesus' life that the New Testament does not discuss, he could very well have been studying Mithraism. If that's the case, it wouldn't be too unreasonable to suppose that Jesus' teachings were an attempt to bring the tenets of Mithraism to the Jews. Interesting possibilities to consider.