In accordance with His own purpose and good pleasure, God created Adam and Eve and commanded them not to eat of the tree of knowledge of good and evil. Obedience to the command would lead to a continued life, both of joyful fellowship with God and of dominion over creation.
Disobedience to the command would lead to spiritual and physical death and all the accompanying maladies.
Adam and Eve were tempted and disobeyed the command. Because of their disobedience, their fellowship with God was broken and they fell from their original state of righteousness and holiness. These devastating consequences of Adam’s disobedience were not limited to him, but resulted in the fall of the entire human race. Although the Scriptures do not remove all mystery surrounding this great truth, they affirm that the sin and guilt of Adam has been imputed, or credited, to all his descendants, and that all men without exception are now born bearing Adam’s fallen nature and exhibiting Adam’s hostility toward God.
After God created Adam in His image, He gave him a simple command: “From the tree of the knowledge of good and evil you shall not eat.” A warning followed this prohibition: “In the day that you eat from it you will surely die” (Genesis 2:17). Adam’s obedience to God would lead to a continued or possibly even greater state of blessedness. His disobedience would lead to death.
(a) With one act of disobedience, Adam and Eve fell from their original state of righteousness into moral corruption. Their hearts and minds were no longer pure, but became defiled and shameful. The coverings they made from fig leaves were a feeble attempt to hide their shame, sin, and corruption.
(b) Sin always results in fear and separation from God. Sinful man runs from God’s holy presence and fears His righteous judgment.
-The Truth About Man