But who, they retort, cannot see that the cause of the Primacy, which we defend, is far inferior? For our exposition is opposed not by one or two parties, but by them all in a mass, Anglicans, Lutherans, Calvinists, and _all who are not Catholics_. The addition is significant, _all who are not Catholics_, for indeed all these, and these alone, are our opponents. Yet their very name creates the gravest prejudice against them, and shows them to be unworthy of attention. As S. Augustine said, "The Catholic Church is one, to which different heresies give various names, they themselves each possessing their own name, which they dare not refuse. Whence judges unaffected by partiality can form an opinion to whom the name of Catholic, which all aim at, ought to be given."[19] If, then, the name of Catholic is a note of truth, the negation of that name is a test of error and heresy. But no one will imagine that heretics, that is, the enemies of Christ and the Apostles, have a right to be followed in what concerns the doctrine of Christ, and the Apostolic institutions. Thus what Tertullian said is to the point, "Though we had to search still and for ever, yet _where_ are we to search? Is it among heretics, where all is foreign and opposed to our own truth, whom we are not allowed to approach?[20] What servant expects food from a stranger, not to say an enemy of his lord? What soldier takes donative or pay from confederate, not to say from hostile kings, except he be an open deserter and rebel? Even the woman in the Gospel searched for her piece of silver within her own house. Even he who knocked, struck the door of a friend.[21] Even the widow solicited a judge, who was hard indeed, but not her enemy. No one can be built up by the person who destroys him. No one be enlightened by one who shuts him up in darkness. Let us search then in our own, and from our own, and about our own, and only that which can be questioned without harm to the rule of faith."[22] But if we look closer into the matter, we shall find that even in the interpretation of our texts Protestants are not so agreed with each other as uniformly to oppose us. Some of the greatest names amongst them, such as Camero, Grotius, Hammond, Leclerc, Dodwell, Michaelis, Rosenmueller, and Kuinoel, differ from the rest and agree with us in interpreting, "upon this rock I will build My Church," words of great importance in the controversy about the Primacy. So that we were not wrong in stating that Protestants do not entirely agree among each other in their interpretation, nor disagree with ours.