Brigham Young

Many have tried to penetrate to the First Cause of all things; but it would be as easy for an ant to number the grains of sand on the earth. It is not for man, with his limited intelligence, to grasp eternity in his comprehension. There is an eternity of life, from which we were composed by the wisdom and skill of superior Beings.

B. H. Roberts

To limit and insist upon the whole of life and death to this side of Adam’s advent to the earth, some six or eight thousand years ago, as proposed by some, is to fly in the face of the facts so indisputably brought to light by the researcher of science in modern times, and this as set forth by men of the highest type in the intellectual and moral world; not inferior men, or men of sensual and devilish temperament, but men who must be accounted as among the noblest and most self-sacrificing of the sons of men—of the type whence must come the noblest sons of God, since “the glory of God is intelligence” (D&C 93:36); and that too the glory of man.