Where Joseph differed from great contemporary rulers, and where he was akin to the Jacobins, was in the intensity of his belief in the power of the state when directed by reason. As an absolutist ruler, however, he was also convinced of his right to speak for the state uncontrolled by laws, and of the sensibility of his own rule. He had also inherited from his mother the belief of the house of Austria in its "august" quality and its claim to acquire whatever it found desirable for its power or profit. He was unable to understand that his philosophical plans for the molding of humanity could meet with pardonable opposition. Joseph was documented by contemporaries as being impressive, but not necessarily likeable. In 1760, his arranged consort, the well educated Isabella of Parma, was handed over to him. Joseph appears to have been completely in love with her, but Isabella preferred the companionship of Joseph's sister, Marie Christine of Austria. The overweening character of the Emperor was obvious to Frederick II of Prussia, who, after their first interview in 1769, described him as ambitious, and as capable of setting the world on fire. The French minister Vergennes, who met Joseph when he was travelling incognito in 1777, judged him to be "ambitious and despotic."