"For God doth know that in the day ye eat thereof, then your eyes shall be opened, and ye shall be as gods, knowing good and evil." Genesis 3:5.
The devil's statement was partly true and partly a lie. And in all his work he will mix enough truth with his lies to deceive those who do not know him and his ways well enough to see the difference.
It is true that the fruit of that tree would make those wise who ate of it. It would make them wise in the knowledge of evil, and the Lord did not want them to know anything of evil. Such knowledge brings death.
But Satan lied when he said, "Ye shall not surely die," and he knew it. He has been telling this lie ever since. The Lord has said, "The soul that sinneth it shall die."
Eve believed the devil instead of God. She ate of the fruit and gave to Adam, and he ate of it.
The first result of their sin was shame. They saw that they were naked. Then they made themselves aprons of fig leaves, and hid themselves so that none should see them. Sin always brings shame.
But they could not hide from God. He called them and asked what they had been doing.
Hiding from God.