"All things have been committed to me by my Father. No one knows the Son except the Father, and no one knows the Father except the Son and those to whom the Son chooses to reveal him." -- Jesus' words in Matthew's Gospel. All these groups differ on things we barely know - who the Son is as from before time: Arian Orthodox, Trinitarians, Unitarians, Jehovah Witnesses, Mormons, Muslims, Oneness Pentecostals, etc.. What matters is to accept the truth that Daniel saw one like a Son of Man together with God and this human being in spiritual form He saw is Son of God and came in flesh and died for our sins and reveals to some the God who is His Father. To know who this Son of Man is may well be beyond our calling as human beings and maybe that is why there are different groups seeking knowledge we cannot know; not in this life.
