I have answered this in post #15.
We could not handle the knowledge. Evidence? Adam and Eve instantly felt fearful and ashamed of themselves, due to all the evil possibilities running through their minds. They were once pure and unaware of such things and lived without fear.
Evil is simply the wrong of anything. Do not think evil in terms of hollywood horrors, that would be wickedness, a branch of evil. Evil covers literally everything and anything that should not be. God created all things, and all things have set purposes, uses and actions. All things were created good. But anything viewed through the eyes of evil can and will twist all sorts of things in all manner of ways.
Hence, Matthew 6:22.
The light of the body is the eye: if therefore thine eye be single, thy whole body shall be full of light.
We were only ever meant to know good and experience good. And this is what is promised to us at the end, thanks to the LORD Jesus Christ.