Man’s Search for Meaning, Frankl, pp.117-121; Teachings of the Prophet Joseph Smith, p. 58; Conference Report, Apr. 1978, p.20; refer in this text to 3 Ne. 18:20
“By way of illustration I borrow the following from the works of Orson Pratt: ‘When Europeans first began their explorations in the New World, the Indians whom they met were much amazed at the power and explosive properties of gunpowder and asked many questions respecting the manner in which it was produced. The Europeans, taking advantage of the ignorance of the … [Indians], and seeing an opportunity to increase their wealth by the deception, told the Indians that it was the seed of a plant which grew in the lands they had come from, and doubtless it would thrive in their land also. The Indians, of course, believed this statement, and purchased the supposed seed, giving in exchange for it large quantities of gold. In implicit faith they carefully planted the supposed seed, and anxiously watched for its sprouting and the appearance of the plant; but it never came. They had faith in the statements made to them by the Europeans, but as these statements were false, and therefore the evidence on which the Indians based their belief untrue, their faith was vain.’ Thus must it ever be. Only correct evidence, only truthful testimony can produce fruitful, profitable, true faith. No matter how sincere one’s belief may be in an error, that will not transform the error into truth. The sincere faith of the Indians in what the Europeans had said about the gunpowder seed did not make that substance produce a plant yielding gunpowder. And so faith in false doctrines, founded upon false testimony, cannot savor of salvation.” (B. H. Roberts, The Gospel and Man’s Relationship to Deity, pp. 46-47)