Adam, in his innocence, had enjoyed open communion with his Maker; but sin brought separation between God and man, and the atonement of Christ alone could span the abyss and make possible the communication of blessing or salvation from heaven to earth. Man was still cut off from direct approach to his Creator, but God would communicate with him through Christ and angels.

    Thus were revealed to Adam important events in the history  of mankind, from the time when the divine sentence was pronounced in Eden, to the Flood, and onward to the first advent of the Son of God. He was shown that while the sacrifice of Christ would be of sufficient value to save the whole world, many would choose a life of sin rather than of repentance and obedience. Crime would increase through successive generations, and the curse of sin would rest more and more heavily upon the human race, upon the beasts, and upon the earth. The days of man would be shortened by his own course of sin; he would deteriorate in physical stature and endurance and in moral and intellectual power, until the world would be filled with misery of every type. Through the indulgence of appetite and passion men would become incapable of appreciating the great truths of the plan of redemption. Yet Christ, true to the purpose for which He left heaven, would continue His interest in men, and still invite them to hide their weakness and deficiencies in Him. He would supply the needs of all who would come unto Him in faith. And there would ever be a few who would preserve the knowledge of God and would remain unsullied amid the prevailing iniquity.

Patriarchs and Prophets   P 67