3. The free discussion of convictions without which it is not possible to know whether they are true or false, which is the verification of truth. A man is not a man unless he is a thinker; he is a fool having no ideas of his own. If he happens to live among men who do think, he browses like an animal on their ideas. He is a sort of kept man being supported by the thoughts of others. He is what in England is called a pauper, who subsists upon "outdoor relief," allowed him by men of intellect. Without the right of publicity, individual thought, however praiseworthy and however perfect, would be barren to the community. Algernon Sidney said: "The best legacy I can leave my children is free speech and the example of using it." The clergy of every denomination are unfriendly to its use. The soldiers of the cross do not fight adversaries in the open. Mr. Gladstone alone among eminent men of piety has insisted upon the duty of the Church to prove its claims in discussion. In his Introduction to his address at the Liverpool College (1872 or 1873) he said: "I wish to place on record my conviction that belief cannot now be defended by reticence any more than by railing, or by any privileges or assumption." Since the day of Milton there has been no greater authority on the religious wisdom of debate. Thought, even theological, is often useless, ill-informed, foolish, mischievous, or even wicked; and he alone who submits it to free criticism gives guarantees that he means well, and is self-convinced. By criticism alone comes exposure, correction, or confirmation. The right of criticism is the sole protection of the community against error of custom, ignorance, prejudice, or incompetence. It is not until a proposition has been generally accepted after open and fair examination, that it can be considered as established and can safely be made a ground of action or belief.* * See Formation of Opinions, by Samuel Bailey. These are the implementary rights of thought. They are what grammar is to the writer, which teaches him how to express himself, but not what to say. These rights are as the rules of navigation to the mariner. They teach him how to steer a ship but do not instruct him where to steer to.