The holy book of Genesis (literally “beginnings”, the antonym of eschatology) is packed with advanced Hebrew philosophy, with meanings piled on other meanings.
The original Adam and Eve were neither good nor evil, but amoral, like animals. Because whether they *did* good or evil, only God knew. They did not. But when they ate of the Tree of the Knowledge of Good and Evil, they became inherently different beings.
Where did sin come from?