By hearkening to observe all the words which I, the Lord their God, shall speak unto them, they shall never cease to prevail until the kingdoms of the world are subdued under my feet, and the earth is given unto the saints, to possess it forever and ever. 103:21

Trivia: What man in the Doctrine and Covenants is said to be a perfect man who looked just like his father - so much so, in fact, that they could only be distinguished by their age?