A person can be considered a Jew several ways. According to Rabbinic law as codified in the Talmud anyone born of a Jewish mother is a Jew, no matter the paternal lineage. A Jew can also be someone with no Jewish ethnic heritage who converts to Judaism and/or self identifies as a Jew by following the laws and customs. A person can also be ethnically descended from Jews yet follow not a whit of Judaism, such as being a practising Christian or Muslim, or more commonly, an Atheist.