ユダヤ教で「風水」は罪ですか？

Judaism's feng shui debate replays a Talmudic argument the tradition already had — about stars. The rabbis accepted that celestial bodies signaled (mazal) yet ruled the exception that defines the faith: 'ein mazal le-yisrael' — Israel is not bound by the constellation (Shabbat 156a), because providence outranks the system. The parallel is exact: feng shui is a mazal-system for furniture, and the Jewish question is whether forces govern or God does. The prohibition-side has the verses: Leviticus 19:26 pairs 'you shall not practice divination (lo tenachashu)' with 'believe in His prophets' in the Jewish reading — nichush covers reading fortunes from arrangements and signs, which Maimonides (vehement anti-astrologer) classed among the idolatries of his era. The permitted-side is real too: the tradition's own segulah-library (red strings, keys under pillows) shows folk practice tolerated practical-benefit objects, and no one prohibited placing a bed against a solid wall. The modern psak-shaped answer for a Jewish home: design freely, blessedly — and keep the metaphysics out; the mezuzah on the doorpost (with Maimonides' meaning-first instruction) is the tradition's own statement about what belongs at the threshold: remembrance of God, not management of forces.