5. =Peace with France. 1559.=--It was this Calvinistic system which was admired by many of the exiles returning to England, but which Elizabeth detested as challenging her own authority. Her only chance of resisting with success lay in her power of appealing to the national instinct, and of drawing men to think more of unity and peace at home than of that search after truth which inevitably divides, because all human conceptions of truth are necessarily imperfect, and are differently held by different minds. To do this she must be able to show that she could maintain her independence of foreign powers. Though her heart was set on the recovery of Calais, she was obliged in =1559= to make peace with France, obtaining only a vague promise that it might be restored at a future time. Shortly afterwards peace was made between France and Spain at Câteau Cambresis. Elizabeth was aware that, though neither Philip II. of Spain nor Henry II. loved her, neither of them would allow the other to interfere to her detriment. She was therefore able to play them off one against the other. Her diplomacy was the diplomacy of her time. Elizabeth like her contemporaries, lied whenever it suited her to lie, and made promises which she never intended to perform. In this spirit she treated the subject of her marriage. She at once rejected Philip, who, though he was her brother-in-law, proposed to marry her immediately after her accession, but when he suggested other candidates for her hand, she listened without giving a decided answer. It was convenient not to quarrel with Philip, but it would be ruinous to accept a husband at his choice.