The interaction between national constitutional courts and the CJEU has never been easy. The issue of whether EU law takes precedence over national constitutions and who is competent to determine that has always been at the center of their discussion. Many constitutional concepts have now become part of EU law therefore this is the right time to shift from competitive to cooperative discourse. In view of illiberal tendencies, the CJEU and national constitutional courts even have a common responsibility to join their efforts in safeguarding the values of constitutionalism in Europe. Where the difference lies between “diversity” and “abuse”? Are national constitutional courts and the CJEU allies or enemies in safeguarding the values of constitutionalism in the EU? How to ensure that both courts act with the same systemic understanding in mind?