“When the woman saw that the tree was good for food, attractive to the eye, and desirable for making one wise, she took some of its fruit and ate it. She also gave some of it to her husband who was with her, and he ate it. Then the eyes of both of them opened, and they knew they were naked:..”. (NET) The fruit itself did not produce knowledge of evil. There are two categories of knowledge that are presented in this incident. There is knowledge about evil, and knowledge OF evil. The first human pair knew about evilbecause God met with them daily and gave them everything they needed to know to decide whom they will follow. They not only knew about good but also knew good itself because God created them good.
Adam, by his decision to disobey God, gained an experiential knowledge OF evil which they did not possess until they decided to disobey God’s command. They knew about evil, but knowledge about evil is not evil knowledge. The experience of evil is always evil knowledge. The knowledge OF evil begins with a decision to experience it. God called the tree in the center of the orchard in Eden “the tree of knowledge of good and evil”; He did not call it “the tree of knowledge about evil. God was telling the first human pair that the moment they eat the fruit of that tree they will experience evil in a way they will never be able to free themselves from slavery to it.
The woman saw that the fruit of the tree is good for making one wise. Adams decision to disobey God was a deliberate decision by his spirit, intelligence; the history however shows that it was not a wise decision. The first pair gained additional knowledge they could not have obtained by other means but, that knowledge did not make them wiser. Knowledge about evil does not require a personal involvement in evil itself. Knowledge OF evil, however, could be gained only by personal involvement in, and association with evil.