During Vatican II, the Council Fathers avoided statements which might anger Christians of other faiths.[page needed] Cardinal Augustin Bea, the President of the Christian Unity Secretariat, always had the full support of Paul VI in his attempts to ensure that the Council language was friendly and open to the sensitivities of Protestant and Orthodox Churches, whom he had invited to all sessions at the request of Pope John XXIII. Bea also was strongly involved in the passage of Nostra aetate, which regulates the Church's relations with the Jewish faith and members of other religions.[d]