Why do Jews say “Shema Yisrael” precisely in a moment of danger?

This source-based Hagut Yosef essay explores the question: Why do Jews say “Shema Yisrael” precisely in a moment of danger? The canonical Hebrew article develops the theme through Torah sources and reflection on human life. This localized discovery layer preserves the source’s meaning and identity and does not add new halakhic, historical, psychological, medical, legal, political, scientific, or empirical claims beyond the Hebrew source.