Why is Knowledge a sin?

Now i am not a religious man, But i certainly enjoy the stories. I hold a huge respect for what religion offers us by way of lessons and morality. I'm sure we all know the story of Adam and Eve. The apparent basis of humanity according to Christians. Do we think this story is actually 100% true? That's actually completely ridiculous if you ask me. There's a man by the name of Joseph Campbell who spent his life studying the mythos, the bible and religion for meaning. Very famous mythologist who i believe discovered the meaning of life. But thats another topic for another day. What i want to talk about right now is what he once said about the story of Adam and Eve. He claimed the entire story was basically a metaphor. According to Christians, almost everything you do right now is a sin unless you've been baptized or circumcised. Life in it's very essence is a sin, it's why we try to do so much good now, because the apparent point of life is to just be good until we go to heaven where we belong.

If you examine the story of Adam and Eve you realize that this story is a complete story about turning your back to life. Adam is representative of man, because he is a man. Eve represents life, because as a woman she gives birth. Woman all throughout history are a representative for life. The snake which charmed Eve? Also represents life, because the snake sheds it skin the way the moon sheds its shadow. That's why so many cultures hold the snake to be a religious icon, to be representative of some higher power. So why is it that the icon for life seduces the icon for new life to chase knowledge and that earned a 1 way ticket to this hellish land for which we live now? Knowledge comes from the Tree of knowledge where Eve ate an apple from. What the story is basically saying is that for a baby to grow up and chase knowledge of life is a sin. Basically we're supposed to grow up knowing the bible is law and just accept that as fact. This is the only way to heaven.

This is all well and good. Fine. Whatever. This is back in the day when people didn't think the same. Yes, it's a really childish attitude to just turn your back on life, and to question anything is just in human nature, and turning your back on what you should natural do is just... stupid. Whatever. My question is, why is chasing knowledge a sin?

Now on of my favorite shows of all time is a show called Fullmetal Alchemist. And they actually touch on this fact. Though the show is actually quite sacreligious, and the main focal point of it is to show how its arrogant to consider yourself anything greater than a human, it doesn't explain why knowledge is a sin. Spoiler alert here if you haven't watched the show yet! At the end when they defeat the Dwarf and he meets the Truth and the Truth sentences him to despair beyond the portal of truth, The homunculis asks what is so wrong with chasing knowledge. I understand that he took it too far, but Truth never elaborated on why it was so bad to chase knowledge. Chasing knowledge though is known to be human nature.

Now there is also the story of the fall of Icarus. If you don't know it here's how it goes. It tells the story of a boy who wanted to fly, so he created wings made of wax and achieved flight. However he flew too close to the sun and came crashing down to Earth. This story is a metaphor. Human's who try to get close to the sun will just get burned. We are not meant to have powers equivalent to a God. But we also weren't meant to limit ourselves either. Life is something that should not have been, it's a gift that we can enjoy, but not to test the limits of humanity.

One of my favorite stories is that of the Dragon who sought out the wisest man in the World. I don't what this story is really called, i don't know where it originated, all i know is this is the way it was told to me and it always stuck. There was a Dragon who had the power to destroy mankind. But he also held the secrets to the world and life in his cave. He never caused trouble, he just stayed in his cave. Legend has it that he was the protector of the secret to life, and only the wisest man in the world would be able to view it. Many a wise men traveled to see this Dragon, The Dragon would give them a test, and if they failed they would be incinerated. If they passed, he'd show them the secrets that all of mankind has searched for for centuries. All of the wise men failed... until one day a Vagabond showed up in the cave. He just had plain curiosity for what the world held. He met the Dragon and held his ground courageously. The Dragon asked him one question, "Are you the wisest man in the world?" The man answered, "No i am not." The Dragon asked, "What gives you any right to see what i've kept hidden for many years?" The man said, "All i know is that i know nothing. I come here searching for answers, because i am completely ignorant." The Dragon let him pass through. The only man to ever see it. The Dragon knew, the wisest man in the world, is the one who knows that he knows nothing.

This is why knowledge can't be evil to me. But then again, its just too much to think about.