There is nothing more obvious, from experience and observation, than that men _feel_ their ability to control their belief, and realize both their own obligations and those of their fellow-men on this subject. They know that every man must act according to his belief of right and wrong, and thus that the fulfillment of every duty depends upon the nature of our belief. And the more important are the interests involved in any question, the more men perceive their obligations to seek for evidence, and obtain the knowledge necessary to enable them to judge correctly. The estimation of guilt among mankind, in reference to wrong belief, is always proportioned to the interests involved and the opportunities for obtaining knowledge. In the minute affairs of life, where but little evil is done from false judgments, but little blame is attached to a man for believing wrong. Neither is a man severely judged if the necessary knowledge was inaccessible or very difficult to be obtained. But where a man has great interests committed to his keeping, and has sufficient opportunity for obtaining evidence of truth, the severest condemnation awaits him who, through inattention or prejudice, hazards vast interests by an incorrect belief. If an agent has the charge of great investments, and through negligence, or indolence, or prejudice ruins his employer, his sincere belief is no protection from severe condemnation. If the physician has the health and life of a valued member of the community and the object of many affections intrusted to his skill, and from negligence and inattention destroys the life he was appointed to save, his sincere belief is but a small palliation of his guilt. If a judge has the fortune and life of his fellow-citizens intrusted to his judicial knowledge and integrity, and, through want of care and attention, is guilty of flagrant injustice and evil, the plea of wrong belief will not protect him from the impeachment and just indignation which await such delinquencies. There is no point where men are more tenacious of the obligations of their fellow-creatures than on the subject of belief. If they find themselves calumniated, unjustly dealt with, and treated with contempt and scorn from prejudice or want of attention, the reality of belief is little palliation of the guilt of those who thus render them injustice. They feel the obligations of their fellow-men to _know the truth_ in all that relates to their interests, honor, and good name; and often there is scarcely any thing which it is so difficult to forgive as the simple crime of wrong belief. The only modes by which men attempt to justify themselves for guilt of this nature are to show either that the matter was of small consequence, or that the means of learning its importance and of obtaining the other necessary information was not within reach.