Faith in a lie will not have a sanctifying influence upon the life or character. No error is truth, or can be made truth by repetition, or by faith in it. Sincerity will never save a soul from the consequences of believing an error. Without sincerity there is no true religion, but sincerity in a false religion will never save a man. I may be perfectly sincere in following a wrong road, but that will not make it the right road, or bring me to the place I wished to reach. The Lord does not want us to have a blind credulity, and call that the faith that sanctifies. The truth is the principle that sanctifies, and therefore it becomes us to know what is truth. We must compare spiritual things with spiritual. We must prove all things, but hold fast only that which is good, that which bears the divine credentials, which lays before us the true motives and principles which should prompt us to action.—Letter 12, 1890. 2SM 56.1