sentences:  This is particularly true of his commentary on Ps.lxiv, that appeared separately as "Liber de corrupto Ecclesiæ statu ad Eugenium III Papam" ("P.L.," CXCIV, 9-120); Sackur, 439-92).There are also a number of polemical works and letters against the Christological views of Abelard, Gilbert de la Porrée, and Bishop Eberhard of Bamberg; others deal with the errors of Folmar, Provost of Triefenstein, on the subject of the Holy Eucharist.