Adam and Eve disobeyed a direct instrution from their Crator. They believe another, one so evil we are still deceived by the same at times.
They did not need to know good and evil to distinguish them, one from another, but they did know their Father and they disobeyed Him.
So are we in the same condition until we realize we have a Father Who loves us, and became just like us as His Only Begotten in order to save us.
This theme of truth could be elaborated upon much, even unti His return, but faith saves us misusing our to to discuss and not believe. Believing by faith is so much easier than using our mere minds to explain what God has don and is doing for us every instant.
Have faith, and believe, and all will be just fine. Love and blessings in Jesus-Yeshua . j