This book proposes a methodology for the conception of Jesus by a human mother and a divine father. The method makes use of scientific genetic processes which operate in the conception of any human being, but with a divine contribution. Various currently held theories of methods by which Jesus appeared on earth are shown to lack evidence. Arising from this method, Jesus' sonship from God is proposed to have been literal and not metaphorical as is suggested by current theology. Therefore, Jesus is presented in this writing as the literal son of God, being both human and divine. As such, he was the unique and suitable offering to God to make atonement for the obvious wrong-doing of human beings. If this methodology is correct, the way a trinity of divine persons may be perceived is suggested.