Please note that knowledge is gained by obedience. It comes by obedience to the laws and ordinances of the gospel. In the ultimate and full sense it comes only by revelation from the Holy Ghost. There are some things a sinful man does not and cannot know. The Lord’s people are promised: “By the power of the Holy Ghost ye may know the truth of all things” (Moroni 10:5). But if they do not seek the Spirit, if they do not accept the revelations God has given, if they cannot distinguish between the revealed word and the theories of men, they have no promise of gaining a fullness of truth by the power of the Holy Ghost.