What is the meaning of the phase separation of church and state? what part of the constitution garantees this separation?

Read the following quotation from catholic bishop jacques-bénigne bossuet at the court of louis xiv. rulers then act as the ministers of god and as his lieutenants on earth. it is through them that god exercises his empire. . consequently, as we have seen, the royal throne is not the throne of a man, but the throne of god himself. what best summarizes the bishop’s point of view? b). kings on earth rule with god’s authority.