 In his treatment of the sacraments at the end of his commentary on the Sentences, Marsilius drew heavily on the writings of Thomas Aquinas and Bonaventure. He defended Thomas’s view that the word ‘this’ pronounced by Christ at the Last Supper in uttering ‘This is my body’ (Mk. 14:22) refers to what the bread and body have in common. Thomas of Strasbourg had attacked this view, but Marsilius showed that the earlier Thomas was right and the later  wrong.[34]