In looking over the field of mysterious sayings contained in the Bible, as well as the mystery which enshrouds many phases of human history, we are consoled by the promise of the Savior: "For there is nothing covered, that shall not be revealed; neither hid, that shall not be known." (Luke xii:2; Matthew x:26; Mark iv:22.) In this connection we may cite the fact that men by learning do not see the truth alike, they do not harmonize on the fundamental principles of the Gospel. As an example, they cannot, unaided by revelation, tell the origin, history and destiny of the American Indians. Isaiah, over 200 years before the advent of the Messiah, foresaw the spiritual ignorance of the last days and how that condition would be overcome by the light of revelation. He prophesied as follows: "Wherefore the Lord said, Forasmuch as this people draw near me with their mouth, and with their lips do honor me, but have removed their heart far from me, and their fear toward me is taught by the precept of men: Therefore, behold, I will proceed to do a marvelous work among this people, even a marvelous work and a wonder; for the wisdom of their wise men shall perish, and the understanding of their prudent men shall be hid." (Isa. xxix:13, 14.) By reading the context it is evident that the prophecy refers to a time later than the first coming of the Savior, and that the prediction never could be verified without direct revelation from heaven. Paul, writing to the Hebrews, calls attention to the great truth that the method of the Lord in leading His people from the beginning has been by revelation. He says: "God, who at sundry times and in divers manners, spake in time past unto the fathers by the prophets, Hath in these last days spoken unto us by His Son." (Heb. i:1, 2.) Jesus said in St. John xvii:3: "And this is life eternal, that they might know Thee, the only true God, and Jesus Christ whom Thou hast sent." Paul says in I Cor. xii:3. "No man can say that Jesus is the Lord but by the Holy Ghost."