ユダヤ教で「配偶者に秘密を持つこと」は罪ですか？

Judaism's tradition on marital discretion is surprisingly explicit. The Talmud permits scholars to be imprecise about three matters: the bed (marital intimacy), hospitality given and received, and one's study schedule (Bava Metzia 23b) — an ancient recognition that some privacy is structural to dignity, not hostile to intimacy. The halakhic frame for the consequential matters is different: financial obligations, fidelity, and family-status facts (prior marriage, children, health) are material to the marriage's formation — Jewish law treats concealment of major facts at kiddushin as grounds for voiding, the classic mekach ta'ut (erroneous transaction) analysis. Within the marriage, the operating values are shalom bayit (peace of the home) and tzniut (modesty/dignity): the couple's intimate life is protected by an entire tractate's worth of privacy law (a husband may not, per the Kitzur's summary, discuss intimate matters), and daily kindness does not require total narration. The rabbis' practical teaching on secrets distinguishes three boxes: what is yours (permitted privacy), what is shared (joint finances and decisions — honesty required), and what is theirs to know (facts that shape their life — concealment is deceptive). The tradition's goal, as ever, is peace with dignity — a home that is both transparent where it matters and gentle everywhere.