In Judaism, discerning good from evil relies on the Torah and mitzvot (commandments) as the objective moral compass. Because Hashem (God) is the unified source of all existence, evil operates as a concealment of the Divine or an exercise of human free will rather than an independent deity.
- The Source of Morality: The Torah
Objective Standard: Unlike subjective human ethics, the Torah defines objective holiness. Actions that appear outwardly identical are categorized by their ends.
The Concept of Hashem: Hashem (literally “The Name”) created both light and darkness, peace and calamity, as stated in Isaiah 45:7. Hashem is not associated with evil as an essence; rather, evil is a necessary instrument in the physical world to facilitate human moral choice.
- Internal Inclinations (Yetzer)
Human psychology in Judaism contains a constant dynamic tension between two impulses within the soul:
Yetzer Ha-Tov (The Good Inclination): The drive toward altruism, connection with Hashem, and adherence to the Torah.
Yetzer Ha-Ra (The Evil Inclination): The drive toward self-service, physical immediacy, and ego. This urge is not an outside demon but an internal mechanism placed by Hashem to be mastered, granting humans the capacity for free will.
- The Tree of Knowledge Framework
Kabbalistic and Chassidic philosophies (such as the Nefesh HaChaim) explain the transition of evil through human history:
Before the Sin: Adam existed in absolute purity. Evil existed externally as doubt or temptation (the serpent).
After Eating the Fruit: The Tree of Knowledge mixed good and evil, causing humanity to internalize the friction of doubt and moral struggle.
The Antidote: Our purpose in this world (Olam HaSheker) is to engage in Tikkun (repairing the world) and reveal the underlying Divine unity by actively choosing the good.
- Practical Frameworks for Discernment
Halakhic Action: Wrongdoing is not an inherited cosmic stain but a failure of human agency to govern animalistic instincts using rational Torah wisdom.
The Jewish response to evil is not passive philosophical acceptance, but active protest through moral deeds.