But the serpent said to the woman, "You will not surely die. For God knows that when you eat of it your eyes will be opened, and you will be like God, knowing good and evil." So when the woman saw that the tree was good for food, and that it was a delight to the eyes, and that the tree was to be desired to make one wise, she took of its fruit and ate, and she also gave some to her husband who was with her, and he ate. (Genesis 3:4-6 ESV)
For although they knew God, they did not honor him as God or give thanks to him, but they became futile in their thinking, and their foolish hearts were darkened. Claiming to be wise, they became fools... (Romans 1:21-22 ESV)
"Their [Adam & Eve's] disobedience entailed two things that are now characteristic of all of us as humans. On the one hand, for each of us, sin is the claim to the right to myself, and so to my way of seeing things, which—far more than class, gender, race and generation—is the ultimate source of human relativity.
"On the other hand, sin is the deliberate repudiation of God and the truth of his way of seeing things. If my way of seeing things is decisive, anyone who differs from me is wrong by definition—including God. No, especially God, because his way of seeing things is more powerful and therefore more threatening than anyone else’s."
~ Os Guinness, Fool's Talk: Recovering the Art of Christian Persuasion.