It tells what God expected of Adam, and the rules He gave to him. God then put Adam and Eve in the Garden, and they were to keep the garden, and care for the animals. God told Adam they could eat of any of the fruit of the trees except one, which was the tree of the knowledge of good and evil, for in the day that they should eat of it, they would surely die. In this way God made man to discern between right and wrong, and to make choices between good and evil, which is the basic difference between man and animals, for animals have no consciousness of right or wrong, but live only as nature dictates. If they are hungry, they eat. If they are tired they sleep. They live with each other, obeying their natural laws, and staying within their own ranks. They are born and they die; and they complete the cycle of the natural world. The Earth awakens with Spring, grows through the summer supplying nourishment for both animals and fields on into Fall, and "dies" or sleeps through the Winter; and the seasons complete the cycle of Nature. But Adam and Eve would have to make the right choices in order not to die, for in dying not only would his body grow old and die, which is a separation of man's body from his soul, for it is appointed for man to die once, but he could experience separation from God's Spirit. That also is death; it is called spiritual death. Physical death completes the generation cycle of the physical man.
But the garden was soon to be lost to man (read chapter three), because that old serpent, which we know as the devil, came to Eve and lied to her, causing her to believe that the fruit of the tree of the knowledge of good and evil was really a very good fruit to eat, and that it would make them wise like God Himself.
(Gen. 3:13 And the LORD God said unto the woman, "What is this that thou hast done?" And the woman said, "The serpent beguiled me, and I did eat".)
So she took some of the fruit and ate, and then gave some to Adam to eat. Eve was deceived, causing disbelief in God, and Adam was disobedient. The choices that they made!
(Gen 3:17 And unto Adam he said, Because thou hast hearkened unto the voice of thy wife, and hast eaten of the tree, of which I commanded thee, saying, Thou shalt not eat of it: cursed is the ground for thy sake; in sorrow shalt thou eat of it all the days of thy life; Thorns also and thistles shall it bring forth to thee; and thou shalt eat the herb of the field; In the sweat of thy face shalt thou eat bread, till thou return unto the ground; for out of it wast thou taken: for dust thou art, and unto dust shalt thou return.).
Adam condemned the body to return to the dust, forever separating man as created from the spiritual realm. Romans 5:12-16. Man - as man- cannot return to "heaven". The "flesh" is cut off from the eternal habitation. And the soul of man was left to struggle with the evils of this world, and to make the choices to return to God or be separated eternally. But by God's grace, propitiation through Jesus Christ gives us the opportunity to make the choice to return to God through faith by the cleansing blood of the Lamb.
When they had eaten of it, their eyes were opened, and becoming conscious of their "nakedness", they were afraid because of their disobedience to God's command, so they made clothes from leaves and then hid themselves from God. But God knew where they were and what they had done. He talked to them, making them confess what they had done, and told them they would be sent from the Garden. They would have to live according to the natural world and live with the choices and its consequences that were made. They would have to make their own living in the world, earning their food by working very hard to grow it, and because he was taken from dust, man's body would return to dust in death. The "flesh", which brought the death that separated "man" from God, was cut off from eternity, and man was then appointed to die once physically. But man's soul would stand in judgment, and God's spirit would return to God.
(Ecclesiates 12: 6,7: Or ever the silver cord be loosed, or the golden bowl be broken, or the pitcher be broken at the fountain, or the wheel broken at the cistern. Then shall the dust return to the earth as it was: and the Spirit shall return unto God who gave it.)
(Ezekiel 18: 4-6: Behold, all souls are mine; as the soul of the father, so also the soul of the son is mine: the soul that sinneth, it shall die. But if a man be just and do that which is lawful and right, And hath not eaten upon the mountains, neither hath lifted up his eyes to the idols of the house of Israel, ........ Hath walked in my statutes, and hath kept my judgments, to deal truly; he is just; he shall surely live, saith the Lord GOD.)
God told Eve Adam would have rule over her, and that she would bear children in pain and in sorrow. He promised that her "seed" would be the enemy of the serpent, bruising the serpents head (symbolic of the crushing of the authority of the devil), and that the serpent would bruise the heel of her "seed" (symbolizing the non-mortal death wound).
(Gen. 3:14 And the LORD God said unto the serpent, Because thou hast done this, thou art cursed above all cattle, and above every beast of the field; upon thy belly shalt thou go, and dust shalt thou eat all the days of thy life: 15 And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel.)
He also told the serpent that he would crawl upon his belly and eat dust for the rest of his days (symbolic of the humility and shame of sin). We have a way that we treat people when we want to shame them - "making them grovel in the dirt" to show humility. So God made Adam and Eve clothes of animal skins to cover their nakedness, and blood was shed when an animal was slain in order to "cover their nakedness" (based on physical requirements). He then sent them from the garden so that they could not eat of the tree of life and live forever.
(Gen. 3:22 And the LORD God said, Behold, the man is become as one of us, to know good and evil: and now, lest he put forth his hand, and take also of the tree of life, and eat, and live for ever: 23 Therefore the LORD God sent him forth from the garden of Eden, to till the ground from whence he was taken.)
How the Angels must have wept for mankind that day!