In order to belief, then, two things are necessary, viz., evidence, and the choice of the mind to attend to this evidence. When both of these are attained, the belief of truth and the rejection of falsehood are inevitable.

The influence which the will and desires have upon our belief accounts for the great variety of opinions among mankind on almost every subject of duty and of happiness.

There are two ways in which the desires and wishes regulate belief. In the first place, by preventing attention to the subject which would lead to the belief of truths that are inconsistent with the leading desires of the mind. This, in a great measure, will account for the great variety of religious belief. Religion is a subject which is felt to be inconsistent with the leading desires of most persons who are interested in the pursuit of other enjoyments than those resulting from obedience to God in the discharge of the duties of benevolence and piety. It is a subject, therefore, which receives so little examination that opinions in regard to it are adopted with trifling attention.

The second cause of variety of belief is the effect which desire has in making vivid those conceptions which most agree with the leading purpose of the mind. When the mind decides to examine the evidence on any subject, if the decision involves questions which have a bearing on some favorite purpose, all those arguments which are most consonant with the desires appear vivid and clear, and those which are contrary to the wishes are fainter and less regarded. This is a fact which universal experience demonstrates. Men always fasten on evidence which favors their own wishes, and but faintly conceive the evidence which is opposed. This is a cause which operates most powerfully in regard to religious truths whenever they interfere with the leading desires.

This view of the subject exhibits the importance of having the mind directed to proper objects; for if the mind is earnestly engaged in the pursuit of duty, it will be pleased with every development of truth, for truth and duty are never found to interfere. Truth is another name for "things as they are," and it is always the duty and happiness of man to regulate his conduct by seeing things as they are, rather than by seeing them in false relations. That man is best prepared to discover truth who is most sincerely desirous to obtain it, and to regulate his feelings, words, and conduct by its dictates.

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.