 Even in the 1st century CE, Josephus had used the Greek term "ioudaismos", which some translate as Judaism today, even though he used it as an ethnic term, not one linked to modern abstract concepts of religion as a set of beliefs.It was in the 19th century that Jews began to see their ancestral culture as a religion analogous to Christianity.The Greek word "threskeia", which was used by Greek writers such as Herodotus and Josephus, is found in the New Testament.