After the fall, God cursed Satan, man, woman and the Earth. We can read this account in Genesis 3. The curse was so terrible that the whole perspective of man changed. Adam’s fall brought death to all mankind.
Before the fall, Adam was perfect. He had free will, was able to live forever because he was eating of the tree of life, and communed with God. God would come to talk, and instruct him in the Garden. Adam was free. He had the ability to make decisions in his state of innocence, before he acquired the knowledge of good and evil.
Then, God placed Satan, the deceiver, in the Garden. There was only one thing that Adam didn’t have: The knowledge of good and evil. It is what Satan used to entice the woman, “You shall not die; you shall be like God knowing good and evil.”
Unfortunately, it was a lie. Satan was a lier from the beginning. Christ testified of him in John 8:44, “When he (Satan) speaks a lie, he speaks of his own: for he is a liar, and the father of it.”
The reality was that the same very day, Adam and Eve died spiritually and became slaves of Satan. They did not become like God; they learned good and evil, yes, but became unable to choose God’s way of good. They created their own standard of good and evil, because now they were sinners and the power of Satan was over them. Now they would die, not only physically, but also spiritually, and their souls would suffer eternal torment in Hades.
God gives an account of the fall of man in Ezekiel 28:1-19. Many think that God is talking about Satan, but there is no evidence of that. Satan is not a man, and there is no account in the Bible about Satan ever being a good creature. “He is a murderer from the beginning”, said Christ.
Pride was the fall of man. He had the opportunity to choose right, to choose God, but Adam decided to believe the lie of Satan because he “desired to be like God.” His heart got filled with pride and lust; he believed Satan’s lie as he contemplated the forbidden fruit and thought, “it was desirable to make one wise”. Yes, he became “wise in his own eyes”, but he did not attain to the Wisdom of the Living God.
He “was perfect in (his) ways from the day that he was created, till iniquity was found in (him)”. Eze. 28:15
As a result of the fall, man became spiritually dead, a slave of sin and subject to physical and eternal death. (Rom. 3:9-18) That’s why Christ came: to destroy the work of the devil and rescue His people.