Mk 7, 17-23 and its context is a two-level narrative. On the first level, the text is a prophetic critique initially directed against the Pharisaic tradition of handwashing or, more generally, against the Pharisaic understanding of purity. On this level, Jesus opened the way for a departure from Judaism in no way. In other words, Jesus did not teach against the Torah's dietary laws. The second level of the text is Mark's interpretation. For him, Jesus' saying about the food being eliminated into the sewer no longer meant (or primarily did not mean) only that morality is prior to purity questions but also that everything is pure (i.e. for Gentile Christians). Mark, therefore, found in Jesus' saying the basis for the Gentile Christians' exemption from kosher laws. However, it is important to emphasise that one can discover the problem of identity behind the Marcan interpretation. By eating what the Jews did not, Christians clearly signal that they were now outside Judaism. Eating non-kosher food was an identity marker for (Gentile) Christians, emphasising their separation from Judaism. The drawing of boundaries between Judaism and Christianity was and remained an important issue in early Christianity. Whether they interpreted the kosher laws allegorically (Barnabas, Clement of Alexandria) or accepted their literal meaning (Justin), the common theological position was that the kosher laws (Lev 11), as interpreted by Judaism, were not valid for Christians. However, the practice was sometimes quite different from theological thinking: the extent to which the dietary laws applied to Gentile Christian communities was and remains a serious problem.