The Benedictine scholar Jean Leclercq, the outstanding authority on research into Cistercian thought and culture, especially the works of Bernard of Clairvaux, has pleaded since 1947 for an index of biblical citations from the complete works of this author. The Sancti Bernardi Opera which he published together with C.H. Talbot and H.-M. Rochais between 1957 and 1977 has never got this basic tool for which Dom Leclercq has argued on so many occasions. Now, more than twenty years after the completion of the edition, scholars finally have at their disposal a comprehensive index of biblical quotations as presented in the edition of Bernard's authentic works. The Index biblicus also contains quotations from the Parabolae which have been published separately by H.-M. Rochais (Analecta S.O.C.; Cîteaux. Commentarii Cistercienses 1962). The Index biblicus as here constituted, is divided into three parts: Biblia sacra, the critical edition of Leclercq-Talbot-Rochais, and the edition by Mabillon in the Patrologia Latina.
The first part (called Biblia sacra) refers to the different books, chapters and verses of the Vulgate Bible, as given in the apparatus of the critical edition, and has been corrected where necessary. In this way the Index biblicus contains 34,569 quotations. A supplementary column has been added to indicate where Bernard does not quote from the Vulgate Bible.
The second set of references is bipartite, each part consisting of three columns: the first set refers to the volume, page and line of the critical edition itself; the second refers to the works of Bernard themselves and their subdivisions.
The third and final part refers to the subdivision of Mabillon's edition as reproduced in the Patrologia Latina (since Migne's reprint was widely quoted until the sixties, even the seventies).